There's a few things I've been thinking about in terms of this match...
First off, I really hope that the Undertaker wins the title. I'm sick of Batista and he definitely doesn't deserve it over Taker or Edge.
Secondly, I don't want the Undertaker to lose his streak at Wrestlemania, even to Edge (who I'm a huge fan of as well, both in my top five favorites along with HBK, Kennedy, and HHH, not in that particular order). They both deserve long reigns, though. I'd like to see a long Undertaker/Edge feud, maybe with the title switching back and forth for a year's period (naturally not 30 times or anything unreasonable though lol).
I'd like to see it, but I don't think I will, if a lot of people got involved in this match. Maybe about halfway into the match, have JBL, Henry, and Khali interfere, but Batista and Undertaker take them all out of the way and keep the fight going. After Undertaker wins the belt, Edge comes out to mark his intentions by attacking him and stealing the belt, running off with it. You're immediately in a storyline right there, as you can hold the premise where Undertaker's the rightful champ and feels he was cheated out of the belt by Edge in the first place, while Edge feels that he never LOST the belt and shouldn't have been forced to give it up. Best of both worlds, lol.
Is the match going to be good? Probably the best out of their series. Who will win? Hopefully the Undertaker. Should Batista get a rematch? Please, no, he's been in every main event for far too long and we need a break from Dave.