I don't know... this seemingly can only go one way... and that's with Zack Ryder. The only thing is that from a storyline standpoint, Ryder has been completely obliterated by Kane. He was in a neck brace, a back brace (I believe they passed it off as a broken back) and a wheel chair with crutches and that was BEFORE Kane threw him and his wheel chair off the stage. Come Raw on Monday night there's only 5 episodes of Raw and Smackdown! to go and to think that Ryder could make a full recovery is just beyond belief. They lost the ability to immediately bring him back when they mentioned some sort of back issue because that is incredibly serious, as is the neck. They've played this up with very serious injuries and Ryder returning to compete at Wrestlemania... I don't know.
The second thing is trying to figure out where Eve fits in. Eve used Ryder to further her career and wanted to use Cena to do the same. Where does Kane fit in to everything? Did Eve plan on being terrorized by Kane this entire time or was Kane onto it? I'd have to believe that Kane's efforts to make Cena "embrace the hate" was connected to Eve's ability to further her own career. Maybe when Eve saw Kane target Cena, she approached him with a proposition about how they can work together to make achieving their goals easier. And if that's the case, does anyone think Ryder has a chance against Kane with Eve in his corner?
I personally would prefer it be Randy Orton. It's such an easy connection. It can be argued that Kane put the mask back on because of Randy Orton. Because he planned to "exorcise" his humanity against Randy Orton last Summer but couldn't win, realizing he needed to go back to his old self. Plus, we've already seen a couple random Kane/Orton matches and they have good chemistry, their match over the Summer on Smackdown! was very good and again, this just seems like something so logical here and it keeps both Orton and Kane up at the top of the roster.
Maybe a guest appearance by Ryder, but I don't want to really see Kane facing Ryder at Wrestlemania. Maybe after a feud with Orton dies down, but Kane should be kept strong right now as a top heel.