Danny is going to get a Blue Bloods spinoff in the form of the planned Boston Blue. However, I believe that both Jamie and Joe had better teases of future storylines that could make for compelling spinoffs than Danny did. While I understand that Donnie Wahlberg is one of the show's most well-known actors, which could be the reason he is the one getting a spinoff, I feel like, narratively, following Jamie and Eddie as they move to Long Island to raise their family would be more interesting.