If we're talking about who wants to face Taker, then Sheamus, Del Rio, and Ryback among others have voiced an interest to go at The Streak, but that doesn't mean it will happen.
Besides, Cena himself said he wants nothing to do with The Streak, here:
Enough proof Taker/Cena at WM is nein, brother?
no that proves nothing cena wants to face Undertaker at wm 30 he said it right here
Vince, Cena, and Taker knows it a big money match waiting to happen. Vince is not gonna pass up on that opportunity ok. UNDERTAKER VS JOHN CENA WILL HAPPEN AT WM 30 do you understand what im saying to you right now. That match = lots of money and Vince loves money and if cena even said he wants nothing to do with the streak thats too bad he doesnt have a choice of Vince says your facing Taker at WM 30 then he is its gonna happen at WM 30 deal with it