Trade a Marvel character for a DC character

[DrNewGod]

Justice Society of America Post Crisis
Alan
Jay
Doctor Fate
Mr Terrific
Black Canary
Wildcat
Star girl
Captain Marvel
Hawkgirl
Hawkman. In exchange for....

The Defenders

Doctor Strange
Hulk
Silver Surfer
Valkyrie
Nighthawk
Hellcat
Gargoyle
Luke Cage
Namor
Scarlet She Hulk

I'd support that just to see the WTF? reaction from both the Vishanti and The Lords Of Order.

[DrNewGod]

Deathstroke for Deadpool.

Slade would start making a villainous mess to establish cred, likely against Paladin and Captain America

Wilson would just get under everybody's fingernails for reasons the rest of us can't fathom.

[Aarkus]

Green Arrow for Hawkeye -- mostly so Ollie can call Captain America a "jingoistic propaganda tool for The Man." Then these two blonde, blue-eyed dudes can hit the road together and discover "the real America" in an old Ford pick-up. Clint and Nightwing can hang because they're circus folk. Then he'd probably find himself in The Suicide Squad somehow.

Doop for Crazy Jane -- Doop can join the Doom Patrol where he'd fit right in and Jane can be in the X-Men, the place for OP crazy psychic ladies.

Dope. I'd love to see Jane and David Haller as a couple

you're not wrong about the rest, either

[Aarkus]

Adam Warlock for Metron

Metron basically gets a clean slate with a fresh start in a new reality full of information that's new to him. he becomes far less cynical and adopts an almost child-like wonder at the prospect

Warlock starts off as his usual aloof self but, as he observes the on-going New Genesis/Apokolips conflict, he somehow becomes aware that his predecessor had remained neutral in this conflict and done little to minimize the threat it poses to the universe that contains it. condemning Metron's approach hardens Adam into taking a far more interventionist stance, throwing down against both sides and adding a twist to the Fourth World corner of the DCU that I don't think has been attempted previously

[Thor-Ul]

She Hulk for Supergirl.