Burning Saber
Super Freak
Yeah as much as I like the X-Men I don't know how many characters would sell that well to be honest. Wolverine is a given since he's popular with casual and hardcore fans. The main other characters I could see being done and selling would be Professor X and Magneto. Possibly Cyclops too but his character in the films was kind of a let down.
From the first trilogy alone I would say Magneto, Mystique, Xavier, Jean Grey and Cyclops would be must haves for me personally. I would also be seriously interested in Nightcrawler and Rogue. I could also see Storm being popular with a lot of folks. The X-Men franchise is a gold mine just waiting to be milked.
The X-Men have been one of Marvel's strongest licenses for a couple of decades now. Despite the recent ascension of Avengers, I really do believe X-Men have enough fans out there to be a big money maker for Hot Toys. Part of me wonders if they decided to wait until Days of Future Past comes out next year. The cynic in me thinks we will see another Wolverine and nothing else. it would be really sad if they end up doing all the Guardians of the Galaxy but not even a handful of X-Men.