Dodson vs. Mighty Mouse is going to be an epic battle, and both guys are great and nice and even. However, I give Mighty Mouse the slight edge. If Dodson won, I would not be surprised.
Aldo is facing Edgar, who we all know is about as good of a challenger any champion in the UFC can face. That fight is an absolute toss up IMO. If Aldo gets past that fight, he still has a few tough contenders left to fight in the next year or two.
Barao fights McDonald next. I gotta give Barao an edge. However, I think McDonald does stand a decent chance.
Velasquez could definitely lose to JDS or Overeem, with both of those fights likely not going to happen until summer. I seem Cain facing someone else first, and winning in dominating fashion.
Bendo has beaten two of the clear 5 best contenders at 155. The only opponents I could see taking his belt (aside from prospects that could develop) are Maynard (who is out with an injury) and Pettis. Against Maynard I give Bendo a pretty significant edge. Against Pettis... well, I don't know. I'll have to see Pettis fight Cerrone first before I am able to judge where Pettis is at physically, mentally, and whatnot.
Rousey isn't losing her next fight. She might lose to Cyborg perhaps, but that fight is probably going to happen in Fall this year, if it happens at all. Aside from Cyborg, I don't think any female fighter stands a chance against her.
Jones and GSP both have easy gimme fights against far inferior competition next, so their titles are safe, barring an insane turn of events. Jones will probably run through Henderson or Gus next. As for GSP, we all know Hendricks is just one hook away from victory.
Silva doesn't have any legitimate competition in Bisping, who is likely his next challenger. Weidman looks to be out for quite a while, and he's the only guy IMO who has any realistic shot at taking Silva's title.
The only way Cruz will lose his title in the near future is if the UFC takes it from him for being out too long. As for whether he will be able to defend his belt successfully, I'll have to see how he is physically first before I can make a proper guess on how well he'll do in a title unification fight.