Marvel Phase 4: 10 Mutants Who Should Be MCU X-Men
2. Pixie
How dare the movies keep out Pixie. Truly a crime worthy of the harshest punishment.
Pixie is one of those characters that you have to actually be dead inside to not absolutely love. She's bubbly, friendly, has boundless optimism, but is also the first one to kick your ass six ways from Sunday if you cause trouble. Her pixie wings give her the ability to fly, almost twice as fast as Angel when she sets her mind to it, she can release "pixie dust" that gives anyone it hits powerful hallucinations, and also she's a witch. Like a straight up candidate for sorcerer supreme should Doctor Strange ever bite it.
Sure right now she can just barely conjure up a sleeping spell and the ability to teleport, but all of this alone makes her a natural fit for the X-Men should Marvel be smart enough to realize the money printer Pixie could prove to be in marketing if they pull her off right.