I like your scenario as long as its not a cheat to win kinda deal. Someone should win clean in my opinion... and i guess in a no DQ match chair use is clean.
The worst possible scenario is a Cena heel turn and win via blatant cheating.
Yeah, in my head, Cena would have The Rock down and hurt, but just not quite able to keep him down for the three count. It is basically a ripoff of the WM17 ending, but I think a Cena heel turn would be more likely to work than Austin's one did...
Of course, I know not
everyone thinks Cena should turn heel, so that might not be a great scenario for them...