These are pretty much a "What If" type of deal. If certain DC characters, and originals from an RPG site I'm a member of were X-Men/mutants.
X-MenName: Jay Andrews
Code Name: Green Lantern
Power: Emitting an explosive green energy from his body. His gauntlets allow him to control the energy and form basic constructs.
Name: Rose Wilson
Code Name: Ravager
Power: Rose is able to see flashes of the future when her adrenaline's high enough.
Name: Marx Coolor
Code Name: Supersonic
Power: Tactile magnetism: Marx can control any metal that touches him. This makes him invulnerable to metal projectiles and weapons.
Name: Cassandra Sandsmark
Code Name: Wonder Girl
Power: Super strength, invulnerability, and flight.
Name: Rebecca McCabe
Code Name: Shockwave
Power: Control over electricity to the extent of being able to turn into it herself.
As of yet...unnamed super villain groupName: Nicole Callahan
Code Name: Bliss
Power: Telepathy and telekenesis. The telepathy becomes more powerful through direct, physical contact.
Name: Matthew Callahan
Code Name: Threshold
Power: Telekinesis and telepathy.
Name: William Hayes
Code Name: Harm
Power: Control over light and darkness, as well as the ability to make both solid.
More to come.