Changing marvel a bit:

X-men: Grant Morrison seems to be writing well. But I would like to continue on that note, and have Prof X kill Jean Grey for being too powerful. However he uses Wolverine (against his will) to kill her. Cyclops, I want Jean Grey to cripple him..kinda have a reverse effect on him, and eventually he goes AWOL and maybe make him a primary villan. Oh yeah, maybe get Northstar and Hank McCoy to hook up.

Spider-man more killing. Kill off Mary Jane. I hate her, and I hate how they brought her back so easily. Also kill off Jonah, but have Spiderman get framed for doing it, and have Robbie Robertson witness it. Then Robbie (one of Spiderman's biggest supporters) become the new Jonah.

Avengers: Can't do much with this motley bunch. Perhaps finally have the government buy it out, let's just say Tony Stark got kicked out and he was bitter about it. Any Avenger is now conscripted to do US missions because they have Vision in charge of implants that cause pain and explode upon removal. Cap America is exmept of course.

Iron Man: Do the spidey! Make him bankrupt and barely surviving ala Darkman. In fact make him poor like Darkman and doing high end inventions with low grade machines.

Thor: Three words: female host mortal. Let the hijinks commence!

Hulk: No more smashin....oh wait...already done.

Silver Surfer: Make him gold...he deserves it.

Captain America: two words, Amnesia Japan. Captain Otaku! But no seriously. maybe have him participate in a Japanese game show!