Asp (Cleopatra Nefertiti)
She has been speculated as being a mutant for years.
Chat (Sophia Sanduval)
Her Earth-20051 counterpart is a mutant but she has shown no powers in her few appearances.
Death Reaper
The daughter of Nekra Sinclair is a possible mutant with Darkforce controling powers that also posseses mystical abilities.
Profile
A Moon Knight villain that has been speculated to be a mutant.
Proton (Geldoff)
His Earth-1610 counterpart has the same abilities an is a confirmed mutant.
Radiance (Ryoko Sabuki)
Her deceased sister Goldfire had the same abilities and was confirmed a mutant.
Tangerine
Her Earth-811 counterpart is a confirmed mutant.
Voice (Jason Cragg)
Has been stated to possibly be a latent mutant whose powers were activated by ionized atoms.