Starring Terra, Aqua and Ventus, (mystery characters introduced in the secret ending of KHII) the game focuses on the search for «Master Xehanort», an evil «Keyblade Master» whom they wish to defeat in their struggle to become Masters themselves. (plusxp.com)
By completing the boxer's life gameplay, you also unlock five other mystery characters. (impulsegamer.com)
As if introducing these two mutants, bringing back others, and adding other new mystery characters wasn't a tall enough task, it has now been revealed that three future X-Force members will debut in Deadpool 2 as well. (screenrant.com)