Well, for one thing, in the video games, the guy who plays Jax' arms were just painted silver.

And I thought Raiden looked better in the movies. I hate Raiden's white costume thing.

And Liu Kang looked boring - exactly like in the game.

OMG you actually expect them to put a grown man into a yellow and blue tiger striped costume. You must be out of your mind. Like they say on the extras of the DVD "the costumes are great in the comic books, but put them on real people and they just look stupid"

As for MK the Jax arms in the movie where great and are probly what inspired the DA arms. Cyrax and smoke looked great (apart from smoke could have been a little different from cyrax, but i guess they didn't know that they were going to change the looks of they cyborgs to differ from each other).
The only thing i hated was the Ninjas, In mk1 they looked feesable becase they were just leather robes and they looked good. But the Mk2 WTF are they wereing plastic??? And the masks in Mk1 were well better than the MK2 ones aswell(all be it a bit chunky)
If there is anything they have to sort out fast it the costumes for people like Scorpion, Sub-zero, Reptile, Ermac, Rain and wheather they have a human smoke. (which i think should be part of the storyline, and sub-zero joins their team not to win MK but to find smoke)