It can't be Batista vs Orton in singles as they're both heels now so something has to change(?)

Personally, before they fully turned Batista heel, I would've replicated the WM X coin toss scenario. Have DB face HHH in the opening match on the premise that if he wins, he faces the winner of Batista/Orton in the closing match.

Batista takes the title from Orton mid-way into the event and drops it to Bryan in the finale. They could've had a big hug-off etc, and I think that would have endeared Batista to fans again, seeing that he was willing to put DB over would give him a good place to rebuild that fan base for a few months.

This doesn't really work now with Batista heel, but neither does Batista & Orton in singles so interested to know if it'll morph into a triple threat, but who's the third man??