I take it back though.

The Undertaker's loss ending his WM streak should be done by someone that won't be buried two weeks later. i mean, it should be a BIG fu</>cking deal that ends up as part of a major plot/push.

Therefore, Kane can't do it. You know two weeks later, he'd be back to jobbing in midcard Hell, and the Undertaker's loss would have been for nought.