My first choices would be:
The Green Hornet - they didn't do justice to this franchise imo
Spawn - i heard mcfarlane is working on something but nothing is finalized
He-Man - about time they do a re-make of the masters of the universe
Green Lantern - they almost made it into a comedy, did not agree with that
Superman - already in production with goyer, nolan and snyder, expect a blockbuster