Savage Hulk Vs. He-Man!!!
Let's say that while using his dark sorcery, Skeletor watches the Hulk demolish NYC while looking thru his dimensional scanner...
"I could surely use this brainless beast to help me conquer Eternia and make Castle Greyskull mine once and for all!" plots Skeletor.
Using a spell to disquise himself in the form of Rick Jones and using a dimensional portal to travel to Marvel-Earth, he tricks the Hulk into following him thru a portal back to Eternia...
"Hulk, you gotta help me...Betty is being held captive in that big green castle that looks like a skull. Only you can save her Hulk. Smash down the big gate and smash the bad bird lady in there. She's the one hurting Betty! Now hurry....!"
"Hulk smash skull-castle and bird-lady!!! Hulk will save Betty!!"
Just as Hulk is about to turn the castle draw-bridge into splinters, He-Man and Battlecat appear from behind...
"Hold it right there my green-skinned friend...no one invited you inside." replies He-Man calmly and he pulls his sword from his sheath...
"Nobody stops Hulk from saving Hulk's friend Betty...HULK SMASH BLONDEHAIR! AAARRRRGGGHHHHHHHHH!!!!!!!!!!!"
.....and the battle for Eternia is on!!!!!! So, does He-Man stop the Hulk and Skeletor from taking over Castle Greyskull??