Personally, I would love the idea of Bo Dallas being recruited into the Wyatt family. It's not like Bo has exactly been setting the world on fire with his current gimmick. The who BO-lieve thing has gotten old and stale a long time ago, so something new, anything actually, would be a step forward for him. His win loss record is hardly stellar either, so seeing him align with someone else and actually start winning matches, I can't see the harm in that.
Regarding Wyatt, he's basically a cult leader with no followers. So seeing him actually convert someone to his side makes sense as well. He keeps talking on and on and on (and on) about his message but up until now, absolutely no one seems to be buying it. It would be fitting to sway someone who is positivity overkill, the ultimate positive thinker, a true Bo-liever, over to the dark side. I think both guys could really benefit from the relationship.
I'd like to see Luke Harper and Erick Rowan rejoin him as well. They tried to go on their way independent of him, and now get lured back under his spell. A true dark faction, I think there could be some legs in that storyline.
All they would need then would be the addition of a sister Abigail, and the group would be complete. One of the NXT girls could probably be used for this role as well.