With Batista’s WWE status for Payback up in the air and WWE officials, including Vince McMahon, reportedly trying to convince him to stay and work the match against Daniel Bryan next month.
The plan coming out of Extreme Rules is if they can’t convince Batista to work with Bryan at Payback, then they will do Kane vs. Bryan in a Buried Alive Match.
Kane sitting up at the end of the Extreme Rules match with Bryan was done because WWE felt they needed that as a last scene in case they had to go with Kane vs. Bryan for Payback.
Source - F4Wonline.com