Rock probably isn't even wrestling at Mania. And think about it this way: If Rock was to wrestle at Mania, it wouldn't be to lose in a WWE title match to Triple H. With his movie schedule I don't see how Rock could have another reign unless he drops it the next month or two. That would be pointless.
Reigns is challenging again, and he'll get booed again.
Reigns is challenging again, and he'll get booed again.