Here is a list of the best possible options in my opinion to make this years mania card.

Undertaker V Sting:
I realize this is a long shot, but as of public knowledge Sting is a free agent, and honestly who wouldn't buy Mania for that match alone.

Undertaker v Tripple H:
This is a better possibility. we know HHH is returning any time now. I just can't imagine ...