Big props to Dr Cosmic, that post is better than the GL movie, all by itself.
Not sure about Monghul though, always thought of him as a Superman villain, and not a very good one, he's like Darkseid's slightly weaker cousin, but still manages to be a bigger *****e-bag. Also, there are so many great GL villains to choose from - with Sinestro and his corps being at the
top of the list.
Also, while Vinnie Jones definitely has the look, I'm not sure I'd find Monghul intimidating with a cockney accent. Jones' Juggernaut was more comic relief than menace in XMTLS. There are still plenty of roles Jones could play in DC films. He could play Lobo, as that accent would suit the character, (although he'd have to say "Bastard" instead of "bastich").
but this is just IMO. If the right director and writers could pull it off why not ?
As long as it was fun to watch, and not lame, then why not indeed ?
BTW Frieda Pinto as Katma Tui would be infinitely better than Blake Lively was as Carol Ferris (she was simply awful).