Disney+ returned to the Andor, is shrouded in more mystery than the rest.
For one, the character introduced in Obi-Wan Kenobi (also due this year). Secondly, it's a series about Cassian Andor's work as a Rebel spy set five years before Rogue One, which means a certain amount of secrecy is necessary, but that doesn't stop anxious viewers from postulating which characters from the Star Wars universe might make an appearance in it.
Saw Gerrera
News broke last summer that Forest Whitaker has returned to the Star Wars universe to reprise his role as Onderonian resistance fighter Saw Gerrera, who was first introduced in the The Bad Batch. Given his turn toward more extremist tactics as leader of the Partisans — almost to the point of paranoid delusion in Rogue One — the prequel series has a ripe opportunity to explore Saw's final years.
What led to his falling out with the Rebel Alliance after he and his team were sent to Geonosis in Rebels? The friction of that splintering should make for a rich plot point in Andor, especially as the title character's work demands that he placate those whose methods, while uncomfortable for some of the Rebellion, still target the overarching evil of the Empire.
Mon Mothma
The former Galactic senator-turned-Rebel-leader seemed to foreshadow the crux of Cassian Andor's biggest challenge in the series, when she expressed concern during Rogue One that morally questionable deeds must sometimes be done for the greater good. With Genevieve O'Reilly confirmed to return as Mon Mothma, her character could very well serve as both a confessor and a judge for the choices Andor makes to advance the Rebellion.
If Andor's work in Rebel Intelligence is the driving force of the series' storylines, then Mon Mothma would fit quite nicely as the M to Andor's James Bond. A Star Wars series with a Bond-like feel would be an interesting addition to the franchise's legacy, as well as allowing showrunners to explore storylines that are as cerebral as they are action-packed.
K-2SO
A year ago, it was reported that Andor's Star Wars: Rogue One sidekick, a reprogrammed Imperial security droid, wouldn't be in the series. Actor Alan Tudyk, who voiced the sassy-but-hulking robot, later clarified that while there are no plans for K-2SO in Season 1, if it proves to be a popular series, he'll eventually return.
The story of how the two met was revealed in the one-shot coming Star Wars: Rogue One — Cassian and K-2SO, and to see that origin story brought to life on the small screen is something fans would certainly applaud. Given that K-2SO provided both heart and comic relief in the film that introduced them both, his inclusion in Andor would make the series a mightier Star Wars offering.
Tivik
Alas, poor Tivik. When last we saw of him, Cassian Andor met him on the Ring of Kafrene in Rogue One to relay urgent information about the plans for the Death Star. When stormtroopers accosted them, Andor escaped, but rather than risk Tivik's capture and confession under duress, Andor shot him.
Given that Tivik had ties to Saw Gerrera's militants, it would make Andor's actions in the film all the more morally questionable to cast him in Andor, the series. Actor David Mays, who played the part in Rogue One, has seemed amenable to return, and developing a backstory between Tivik and Andor would fold into the Rogue One storyline nicely.
Bail Organa
Actor Jimmy Smits doesn't show a listing for Andor on his IMDb entry, but the secrecy surrounding Star Wars properties doesn't mean he's not scheduled to return as Leia's adoptive father. In fact, the rumor of his role reprisal was first reported almost two years ago, which makes Bail Organa's inclusion in the series more than likely.
It only makes sense, given that Rogue One demonstrated just how integral he was as a leader in the Rebellion's early days. With Mon Mothma confirmed as a character in the forthcoming series, we'll likely see a great deal of the Alliance's upper echelon, and any scenes without Organa would be lacking.
Davits Draven
The relationship between Gen. Draven (arguably a minor Star Wars character still important to the plot) and Cassian Andor was an old one by the time they appeared on screen in Rogue One, and while actor Alistair Petrie, who played the Rebel officer in the film, doesn't have Andor on his list of credits, it wouldn't be a surprise if he turned up.
After all, Star Wars fans know that Draven served the Galactic Republic in Military Intelligence during the Clone Wars. After the rise of the Empire, Andor is the one working in intelligence, and Draven actually recruits him for Operation Fracture, designed to rescue or assassinate Galen Erso. As the Rebellion's erstwhile spy wrangler, Draven would be an excellent addition to the cast.
Airen Cracken
He's not a major character, but Gen. Cracken has a long history in the Star Wars universe. He first appeared on-screen in Return of the Jedi during the Battle of Endor, played by actor Michael Stevens, but from the early days of the Rebellion, he waged guerrilla-style warfare against the Empire, which led to his recruitment by the Rebel Alliance.
As chief of Rebel Intelligence, he was responsible for the Outer Rim's spy network, which is a perfect entry point into the Andor series. Given the character's status, it's conceivable that an actor of the caliber of Stellan Skarsgård, who's been confirmed as part of the cast, could bring him to life.
Kertas and Rismor
What's a Star Wars show without colorful and unique alien species? And what could be more colorful than the twin purple sisters Kertas and Rismor, first introduced in the Cassian and K-2SO one-shot?
The two are Rebel spies nominated by Gen. Draven to accompany Andor to the planet Wecacoe to obtain Imperial security protocols. As part of the Alliance's spy network, they could easily fit into a number of possible Andor storylines.
Alexsandr Kallus
As a member of the Imperial Security Bureau, Kallus was a footsoldier loyal to the cause. However, his pursuit of the Ghost in Star Wars: Rebels, and his ensuing fight for survival alongside Ghost crewmember Garazeb Orrelios on the frozen moon Bahryn, led him to question everything he'd come to believe about his service and ultimately defect from the Empire.
As a result, he became a Rebel spy — codename Fulcrum — and served loyally until his treachery was discovered, and he was nearly executed on the orders of Grand iral Thrawn. Given that the plot of Andor will likely include a great deal of spy work, it would only make sense for him to be part of the cast, or at least a guest star.
Obi-Wan Kenobi
Ewan McGregor's return as a Jedi in hiding on Tatooine is a sure thing, as Obi-Wan Kenobi is scheduled to premiere this year on Disney+. Given the savvy cross-pollination of series such as The Mandalorian and The Book of Boba Fett, it would be a clever twist if Kenobi's triumphant return to the screen came in the form of a guest appearance in Andor.
Bail Organa alluded to him in Rogue One, after all, which means the Rebellion is aware of his survival. A plotline in which Andor is dispatched to Tatooine with a message for the hermit of the Dune Sea would be a clever lead-in to his own series, as well as amplifying the star power of Andor.