Just a thought but.. Could end up with HHH assisting Taker in the win?
HHH turns on Shawn for thinking beating Taker is more import than DX, thus turning HHH heel. Taker is pissed because of this and has a series with HHH.
Throughout the series HHH says Taker would have lost had it not been for him, and that he and NOT Taker retired HBK. This ends after Summerslam, where Taker, so fed up with HHH's insults, tears up the contract and brings back Shawn.
Shawn attacks and has a series with HHH, with the Undertaker involved in Michaels getting the upper hand over HHH.
As that series finishes, around the start of 2011, Shawn Michaels thanks Undertaker, but says they have unfinished business. And at Wrestlemania XXVII they have HBK vs. Taker 3, with both going in the Hall of Fame.