Dr. Doom with PG vs WBH

Doom gets the Power Gem and 5 min. prep. Fight takes place on indestructible planet. No bfr. What happens?

Either Doom dies instantly or they have a long drawn out fight and we get the answer to leonidas' question.

Either way, Doom's going to be infinitely better at using the PG can Champion was.

Pffft like Doom needs the gem

Doom uses the prep time to kill himself to avoid dying in the hands of Hulk.

Doom puts the gem in his pocket then casually scrambles the Hulks mind then leaves.

Unless i'm thinking of another hulk, I don't think the Hulk can block Doom from scrambling the signals in his brain.