I hope Taker returns the night after Elimination Chamber or next Monday to prove you nay sayers wrong.
Really though, I pray to god he goes after Punk and the next year he goes after Lesnar, or if not Lesnar (which I doubt they'd even do anyways), Cena. Then again, Matt Hardy & Edge hated each other and they did the feud pretty professionally. I know Taker/Lesnar don't hate each other, from what I've heard they just simply dislike each other but they've been around for a while, especially Taker, so they'd probably do just fine even though they aren't best of buddies at all.
But I honestly think, Cena/Taker would be awesome even IF Cena is a babyface.