Awhile ago I did a fan casting for JLA.
http://www.comicbookmovie.com/fan_fic/news/?a=29865
These are my choices for my sequel.
Plastic Man - Johnny Knoxville
I know he isn't the best actor but the looks say it all.
The Elongated Man - John Krazinski
Sue Dibney - Jenna Fischer
1) they make an amazing couple on The Office
2) I think it would be funny to see a fight between the smart Ralph Dibney and the wise cracking Plastic Man
Green Arrow - Josh Holloway
Amazing actor and has the right look and build.
Hawkman - Gerard Butler
Hawkgirl - Jessica Biel
This is the couple you wouldn't want to mess with.
Atom - Sam Rockwell
Sam Rockwell is an amazing actor and I think he could bring Ray Palmer to the big screen.
Zatanna - Serinda Swan
Vixen - Zoey Saldana
Zoey Saldana is one of my favorite actress and one of the sexiest woman.
Booster Gold - Sean William Scott
Blue Beetle - Paul Rudd
Just refer to role models and you'll see why I picked these two.
Firestorm - Tyler James Williams
Great on Everybody Hates Chris and he has alot of potential.
Next Fan-Cast will be The Injustice League