JDS-Overeem definitely needs to happen. Everybody thought that they would be fighting for the belt. They both lost and they both wanted to fight eachother. The fight makes sense.
BigFoot vs winner of Cormier vs Mir.
Cain vs ????? There is no one. Really no one legit contender. Barnett may be the only option. Or in the worst of scenarios, make a third fight with JDS. It is still soon to give BigFoot the rematch (He lost the first 2 rounds), Cain vs Cormier would not fight.
Maia vs Jacare is a dream match IMO
Rashad vs Shogun
Lil Nog vs Teixeira
Aldo vs KZ