What to do with Brock Lesnar?

Last year, around this time, the WWE brought back Brock Lesnar.  Since then, he has lost to John Cena, broke Triple H's and Shawn Michaels' arm, defeated Triple H at Summerslam, and just lost to Triple H in the rematch at Wrestlemania.  The contract he signed last year restricted him to the amount of time he could be used on WWE programming, but Paul Heyman was there to pick up the slack.  He has signed another deal with the WWE, but now what?

The Rock

Word was that the night after Wrestlemania, he was supposed to go face to face with The Rock and set up a match between the two down the road.  Due to The Rock's injuries sustained in his match with John Cena at Wrestlemania 29, The Rock didn't show for Monday Night Raw, and the writers were scrambling.  I'm sure a match against The Rock.....or should I say rematch from 2002, is in the works.

The Undertaker

I keep hearing that a future Wrestlemania match for The Undertaker will be Brock Lesnar, but I keep thinking that we are 10 years too late for that.  I don't think The Undertaker can withstand the pounding that Lesnar can deliver him.  For the last five wins at Wrestlemania, The Undertaker took on people he has worked with before, granted CM Punk is a different animal than he was years ago.  Just don't think that this would be a great fit anymore.

CM Punk

Paul Heyman's worst nightmare or wet dream....not sure which.  CM Punk could hang with Lesnar, but given his body size and Lesnar's sheer power, I don't know if Punk could pull it off with Lesnar.  Plus, CM Punk is title hungry, Lesnar isn't!

Ryback

After losing his match to Mark Henry in the fashion that he lost it, I think Ryback's push is over.  The next night, he attacked John Cena, but that got the biggest pop of the night, and Vince doesn't like having HIS number one star being overshadowed by a midcarder.  I know the crowd loves Ryback (why, I have no idea) but it reminds me when Jake Roberts was heel in the beginning.  He wrestled Hogan and the crowd turned on Hogan.  The feud ended real quick just to save Hogan's momentum.  Lesnar would kill Ryback because Ryback has very little to offer.  A few clotheslines and a back breaker.  Remember Lesnar vs Goldberg....that didn't end well either.

I'm sure whoever they get to fight Lesnar, it will sell.  It has to, they've spent a ton of money to re-sign Lesnar, hope they're getting their money's work.