Ian Keldon
Fleet Captain
If Moore stuck to adapting the comic version instead of doing his own movie version of the team then it would be sweet...but IIRC, he purposely set out to do his own movie version. I hated LXG because of that. The comics (i haven't read any of the current stuff yet like the Century stuff) are awesome though.
I very much liked that they got rid of the cynical, deconstructionist and dystopian claptrap from the LXG comics and presented the film as a straightforward action/adventure period piece.
I had no problems with the changes the movie made to Moore's League. I didn't even mind the addition of Tom Sawyer (though he really should have been Quatermain's age, if not slightly older, since Huck Finn takes place about 1840). I thought the film captured the spirit of the comic.
The director addresses that in the commentary track. There was a late 1800s Sawyer story published that made him eligible to be depicted as he was in the film.
and from the Wikki article on Sawyer:
Thomas "Tom" Sawyer is the title character of the Mark Twain novel The Adventures of Tom Sawyer (1876). He appears in three other novels by Twain: Adventures of Huckleberry Finn (1884), Tom Sawyer Abroad (1894), and Tom Sawyer, Detective (1896).