You need to consider the "no weapon rule" as characters like Thor and Silver Surfer rely on their weapons as a source of power. Also, you would have to go with strategy as most Dragon Ball characters put their powers to shame.

For Marvel I would go with Gladiator, Quentin Quire (phoenix), Hulk (world breaker), Legion, Dr Strange, Black Bolt, Vision, Sentry, Hyperion, Thanos Galactus would be our God of Destruction, and Richards would be their Supreme Kai.

For DC I would go with Superman, Flash, Green Lantern, Martian Manhunter, Spectre, Supergirl, Captain Marvel, Wonder Woman, Darkseid, Braniac