I seriously think this is a complete waste of a match for the following reasons.
1: We've seen these two face each other before. Lesnar's wrestlemania opponent should be a person who he has never faced before, is similar to him in some way, and isn't John Cena or the Rock.
2: Undertaker's done. His HIAC match with Triple H was a classic and it makes perfect sense to end his career with that match.
3: IT'S A HUGE WASTE OF TALENT. Come on. Brock Lesnar is better then this. He should have his Wrestlemania match be with another wrestler as incredibly talented as him. I said it once and I say it again, the only person who should ever face Lesnar at Wrestlemania if this was going to be Brock's only Wrestlemania, it should be Samoa Joe, but obviously that isn't going to happen. So at least have SOMEONE that is worthy of facing him. If this was Taker from like five or six years ago, I would be all for it.
Please, WWE, don't waste Lesnar like this, like you did at Extreme Rules.