Today Marvel: Avengers Alliance introduced their newest (and also their first openly gay) playable character, Shatterstar.
According to his Wikipedia page, Shatterstar (Gaveedra-Seven) first appeared in The New Mutants vol. 1 #99 (March 1991), and was created by Fabian Nicieza and Rob Liefeld. Since his debut Shatterstar has mainly appeared in the original X-Force title, with some issues devoted solely to him. In 2005, the character was featured in his own limited series, X-Force: Shatterstar. Shatterstar became a member of X-Factor in X-Factor #45 (August 2009).
His character comes with Blade Maelstrom, Mojo Skewer, Vibro Shockwave, and Gladiatorial Carnage moves. He is currently locked, presumably until the next PVP Tournament or the next Special Ops.