Kraid
Well, I don't have much to say on this guy, but hey, I found a way to put him into the movie.
Slayer
In the games, Kraid was often the first boss, so he wasn't very tough. He was just big, fat, and big; just a huge lizard with big spikes that come from his stomach.
In the Chronicles, however, he will be an executioner creature; like in Star Wars Episode 2, kind of like those guys. Adam and Lumi are about to be killed, or eaten, by Kraid in a huge coliseum, when Samus comes to the rescue. The fight then goes on relatively short. A few shots later, Kraid is dead, gone, zippo, zilch.