My two decades of fandom (although that fandom is semi-retired until we get a proper new one) all but guarantee I'll see it at some point, same as Dragon Ball Evolution. I will feel bad about it, however.
Ugh. See, this is how it starts.
Though I guess he'd be the obvious choice, if wanted my hypothesis to be borne out to the letter.
Sometimes it takes a fellow geek to get it right, plus he has made video games of his own work. While not highly successful, the games are pretty fun for a fan. Note, this is if Whedon had to work with Shepard.
If Shepard wasn't an option, i'd probably be happy with someone like Michael Bay since ME is chock-full of explosions.
Peter Jackson would be good from a lore standpoint, though i'd probably read the book too since it'd likely have all the non-movie bits as well.
For something that's more moving and dramatic, i'd lean towards Shyamalan, having loved his work on Unbreakable which, by all accounts, is a comic book movie.
Why have a quad when a pair works just fine?
Seriously though, there are movies where it's better to rage silently, less you light the whole theater on fire.