Mutants potentially, possibly, or near Omega Level.
A character can only be added to this category if they have a reference for when they were 'outed' as a potential or near Omega Level or Omega Class Mutant.
To be differentiated from mutants who have an Omega Level mutants potential, as Iceman, who is an Omega in potential, but rarely express it.
See also the list of possible Omega Level Mutants, needing a reference to be confirmed, and most likely added by errors or fan opinions independent from cannon or editorial material.