Given what he has dealt with in the last year and basically having to baby sit Baron Corbin for the last 4 months, I won't have any problem with Reigns winning the Rumble. The only problems I would have is
1. How do they keep Corbin involved because you know they will
2. The return of the leukemia deniers
3. Who would he actually face for the title at WM? I would hope that he wouldn't face Brock and that it would be either Bray, Bryan, or heaven forbid Corbin if the Smackdown title is defended in an Elimination Chamber match. I mean most people figure Bray is losing AGAIN at Wrestlemania because well that is what he does
As far as women's it really has to be Rousey because Becky has basically exhausted everyone else. It would be nice if it was Shayna but I wonder if they think she is WM ready