This is the second best option right behind John Cena. And it's cool that there will be the Paul Heyman connection from this year's match to next. Heyman can claim that the real "best in the world" Brock Lesnar will do what CM Punk couldn't.
As for whether Taker can survive having a match with Lesnar (that's always been a criticism of this match happening, whether Taker is too beat up to handle a stiff bout with Brock), I'd point people to Wrestlemania 27 and 28 and the fact that Taker had the most physical match of both those cards. I'm sure he can handle Lesnar, especially since Brock is such a beast that the match wouldn't require Taker being hit with a steel chair dozens of times.
I love the image of Taker screaming in pain while in the Kimura. I also hope they redo their No Mercy 2002 spot when Lesnar reversed the Tombstone Piledriver into an F-5 to win (only Taker kicks out this time.)