Re: Downey's last?
That's a tough one I mean if their looking for an actor in their early 40's by the time film starts rolling than that actor would have to be in his 30's at this time.
I'd go with Colin Farrel since he's a former Hollywood badboy as RDJ was.
Self-contained stories part of a larger story is where its at. Not this writing for the trade nonsense. If you're going to write for the trade, don't release it in individual issues. Just release the trade.