I guarantee if Marvel gets him back, his costume will look nearly exactly like it does in the comics. Hell, in the second FF film with Silver Surfer in it, they changed Doom's costume to look nearly exactly as it does in the comic (to my recollection anyway, haven't seen it since 2007) and it looked totally fine.
They probably will have him get his "powers" from a suit like that, which is totally ok. I don't know why both FF adaptations have had Doom get superpowers alongside the Fantastic Four.
They're taking notes from the Ultimate Universe version of the FF, where that's what happens. It's also where they got the electrical powers from the first movie. Apparently no one told them that Ultimate Fantastic Four is garbage and they need to be aping more from Hickman and the 616 version.