Quick predictions:
Cariaso/Cejudo: I haven't watched any of Cejudo's fights, but I heard he looked very good in his last outing. He's an Olympic gold medallist with an improving striking game. Cariaso is a decent fighter, but he's out-matched in this fight. Cejudo via one-sided UD
Overeem/Nelson: Overeem is the better fighter, he should take this fight (but we've heard that many times before). Roy has a knack for landing that over-hand right, it's pretty much his only decent punch. You combine that with the abysmal striking defence and chin of Overeem and you got yourself a recipe for disaster. However, I see Overeem playing it safe and taking the UD win. Roy is just not that good, but a KO win is very possible for him.
Hendricks/Brown: Hendricks looks to be in amazing shape and is looking real hungry. He wants that belt back. Brown is a very tough & exciting opponent though. I see this being a fun fight. In the end, I see Hendricks getting his raised in a clear cut decision.
Pettis/RDA: RDA is a very well-rounded fighter, but Pettis is just better everywhere. I really don't see how he can lose this. Showtime via TKO.