It'd be awesome to see the Wyatts swarm The Rock during whatever the fuck it is that he'll be doing and lay him out. Even more awesome would be if Austin was in the same ring with him when they attacked and got laid out right alongside him (far more likely that Austin and Rock together would probably just fight off the Family, though.)
As for Brock/Ambrose, Bray has no business interfering in that and it would just cheapen everything as a result. Save any sort of Brock beat down for the next night on Raw. Attack Lesnar the night after Mania, put him on the shelf, have Bray spend the next three or four months bragging that his Family have "slayed The Beast" at last, and then build to Brock returning to get retribution in the Summer.