"[1] The term was not seen again until the 2001 limited series issue X-Men Forever #3, where Professor X described Iceman and Marvel Girl's "omega level mutant abilities" having unlimited potential.
[1] In July 2019 during X-Men relaunch of Krakoan Age, Jonathan Hickman provided an official definition in House of X #1 and listed fourteen Omega-level mutants alongside their respective omega power.
[8] For Example: Both Kid Omega and Jean have the highest upper limit for telepathy that there could be possible.In April and July 2019, Charles Pulliam-Moore from Gizmodo and Thomas Bacon respectively had highlighted the challenges that might come with classifying Omega-level mutants.
[19] In May 2024, Robert Wood of Screen Rant hinted the possibility of 'Omega Level' label being altered after the end of Krakoan Age as House of X's definition was defined by in-universe nation of Krakoa.
He also commented that even with flaws, a set of rules was created by Marvel Comics for writers to play, challenge and redefine; encouraging the kind of 'logic puzzle' on which superhero stories thrives.