Where was all this fantastic dramatic weight?
Did I say fantastic? I called it cliché and said Tatum couldn't act. Hardly "fantastic" praise.
I simply said it is the only character or dramatic underpinning to the explosions (beyond, "We need to save Washington guys!"). I understand there is more there in the source material, but I don't know it and judging from Sommers' track record with Mummy 2 and Van Helsing, this cliche writing was still a step up to no character development at all.
Her being bad after disappearing from Duke 4 years ago and the question of what happened to her and why did she become a villain and whether she still loved Duke, while weak and cartoonish, gave the movie some character interaction beyond banal "We need to do this because of [insert McGuffin here] so mount up ladies!"
Yeah, she may not be good in the cartoon or whatever but her conflict and turmoil made her the most interesting character on screen and made Rex/Commander/Doctor/whoever the **** he was more sinister. It gave some dramatic reversal in the third act and put more at stake at the end (revenge, redemption, etc.) than just good guys blowing up bad guys--which is all the story is without this subplot (not counting the ninjas).
Should Sommers have gone more to the source? Sure. Do most fans want that? I think most fans would have been happy had she stayed evil and it played out the same with no flashbacks for them. I think it would have just made the movie duller.
That is all I am saying. For this B-movie which is entertaining mediocrity, it was one aspect that actually worked. Source material or not.