Re: #1 Contender's Match(es)
I wouldn't mind it. I mean one of the reasons MITB became a big deal at Mania was because the winner got a title shot and the Royal Rumble itself is just one big contenders match that has become must see for Wrestling fans every year.
So if they did some kind of match to establish a future contender at any PPV, Mania or otherwise, it would work just fine.
The problem though, as has been stated already, is that so many people get rematches these days and they happen so frequently that it just gums up the works a little bit.