Red she hulk last I saw her helped hulk destroy a planet and was stated to be equal to the world breaker himself iirc....not sure what current Betty does but i think she can solo. All though I am not the hulk expert.
@jashro44: Doc Samson is a base Savage Hulk in stats but thru skill and agility has more than held off Mindless Savage Hulk who trashed the Avengers 3 separate Times before Plot Device. Then Abomination... is Abomination. Tho I should Clarify Classic Abomination. I know nothing of Abomination current or last seen levels.
Also Savage Hulk has tank World crushing attacks.
Galaxy Master was like a half a$$ Galactus and he destroyed many planets with ease. Yet his best couldnt end Savage Hulk.
Also a weaker Grey Hulk manage to bust a Asteroid larger than earth.
So Red She Hulk colliding with World Breaker Hulk to blow a Planet is not a SUPER Game Changer.