With these passing of the torch affairs, it doesn't really matter who's the hero or villan.
But still, you want him to win as a heel without being cheered, but still have him look dominant, whilst also giving him his GOAT moment?
Okay then, here's my attempt
Have the rock pass out to the STF on multiple occassions, have multiple 'ref nearly drops hand thrice, but comes to life' moments. Eventually the referee has no choice but to ring the bell and award the title to Cena (shades of Bret Hart) because The Rock won't even unconsciously
submit to him (that way The Rock doesn't look weak, see?) Have Cena snap and beat the living shit out of The Rock for that very reason.
Now, if he still
gets cheered after the above, then so what? VKM can worry about pushing him as a sith lord the next night on Raw.