So from what I can discern basically it must be someone who manipulates psionically matter/energy/time/reality as a requisite and has no limits to that power as a requisite... both not one or the other... it can't be someone like Cypher whose power (when he was alive) although having no limits (since he can translate any language) wouldn't be classified as omega and it can't be someone who manipulates matter etc but has limits to their ability.
From the known official omega's it seems like usually it's an amped up version of TK and/or TP usually with special application.
e.g. Kid Omega = omega TP, Iceman = omega TK to stop atomic movement and "TP" to exist as consciousness in water, Elixir = omega TK to rearrange matter to heal, and Jean = omega TP/TK to anything and everything.
Jean Grey
Elixir
Iceman
Kid Omega
Storm - maybe... though I'm not convinced yet
Franklin Richards - likely
X-Man, Cable, Rachel Summers - damn alternate reality kids... yeah
Magneto - I'd say he's peaked so probably not
Polaris - possibly
Scarlet Witch - likely
Mikhail Rasputin - likely although disappeared
Exodus - likely although disappeared
Gambit - no longer possible but would have been
Jubilee - 😆 😆 😆
I'd say Psylocke's brother Jamie? is also Omega. I think he's a reality warper too. He just resurfaced and is dragging Rachel and Betsy around outside of reality since Wanda has just screwed it up. He is also the one who resurrected Betsy with his powers.
I'd say any offspring of Scott and Jean Grey/Jean Grey Clone, (Rachel, Cable, Xman etc...) is probably Omega.
Mr. Sinister dedicated hundreds of years of research to finding the DNA mixture to make a perfect mutant and he found it in a Summers/Grey combination. That's why all their kids come out uber powerful or with uber potential.
Apocalypse's "The Twelve" and his prime host - X-Man, are all omega
Apocalypse collected the mutants he required to carry out his plan: Cyclops, Phoenix, Cable, Professor X, Storm, Iceman, Magneto, Polaris, Bishop, Sunfire, the Living Monolith and Mikhail Rasputin.
The Twelve were linked to a machine that would channel their awesome energies into Apocalypse, allowing him to absorb the body of X-Man, a time-tossed teenager possessed of vast telepathic and telekinetic power. As his teammates fell around him, a powerless Cyclops shoved X-Man out of the draining circuit, merging with Apocalypse to create a new evil entity.
Courtesy MarvelDirectory
Originally posted by HarmoNiC FLo
Apocalypse's "The Twelve" and his prime host - X-Man, are all omegaApocalypse collected the mutants he required to carry out his plan: Cyclops, Phoenix, Cable, Professor X, Storm, Iceman, Magneto, Polaris, Bishop, Sunfire, the Living Monolith and Mikhail Rasputin.
The Twelve were linked to a machine that would channel their awesome energies into Apocalypse, allowing him to absorb the body of X-Man, a time-tossed teenager possessed of vast telepathic and telekinetic power. As his teammates fell around him, a powerless Cyclops shoved X-Man out of the draining circuit, merging with Apocalypse to create a new evil entity.
Courtesy MarvelDirectory
Cyclops, Bishop, Sunfire, Monolith and Professor X are not omegas.
Magneto has control over the EM spectrum but his forte is magnetism. I'd say he does have limits to his potential/abilities though and at his age he has reached the peak of his abilities.. so imo not an omega.
Imo the wormhole incident was I think more an example of Wanda's ability than Magneto's. The events of HoM lead me to believe Wanda is an omega.
http://www.killermovies.com/forums/attachment.php?s=&postid=3815809
In the MU not everyone has a relative peak. You could say Jean Grey has peaked as Phoenix, but then her abilites dwarf every other mutants so much that in relation to them her peak is infinity.
From what I understand there are two requisites of being an omega, the nature of the mutant power and the ultimate limitations of the progression of that power.
1) Their mutant power involves the manipulation of energy, time, reality, matter on an atomic scale or a combination of the aforementioned.
2) Omega mutant abilities have unlimited potential to expand to be inconceivably powerful.
The power does not need to necessarily be destructive e.g. Josh Foley/Elixir manipulates organic matter to heal and his abilities have unlimited potential.
Cypher had no limits on his ability to translate languages. Forge theoretically has no limits on what he can build. They would not be considered omegas though.
Magneto can manipulate energy, and is incredibly skilled in the use of his abilities. Elixir manipulates matter, and is not very skilled in the use of his abilities. But Elixir is an omega while Magneto is not because Magneto has peaked while Elixir may never peak in relation to other mutants.
This is all just my opinion though and I'm open to disagreement.