X-Men: Sins of Sinister could be Mister Sinister's Age of Apocalypse moment

gamesradar.com:

Marvel Comics is sending out an SOS (cue Sting's vocals)... 

No, not a message in a bottle, but a series of teasers for the next big X-Men crossover, titled 'Sins of Sinister.' Though Marvel hasn't spelled out the plot of the upcoming event, they've left enough breadcrumbs so far for us to make an educated guess as to what’s gonna happen.

And if we’re right, it’s not looking good for the X-Men - or nearly any mutants for that matter.

While Marvel's initial teaser only stated that SOS would arrive in January 2023, the latest teaser released reveals the crossover's official name. It also spells out longtime X-Men-villain-turned-tenuous-ally Mister Sinister's involvement, while also dropping some big hints about what the story will entail for those who are versed in current X-Men continuity.

Marvel's teaser from August 22 states "Mister Sinister's plans come to fruition beyond his wildest dreams... and his darkest nightmares," resulting in "A new world. A new disaster."

All of that seems to hint that SOS, Sins of Sinister, is going to amount to Sinister's version of his very own 'Age of Apocalypse' type storyline in which all of reality is remade in his image, at least briefly.

How did we get to that? Well, it's all in Marvel's teaser - if you know what you're looking for. In recent X-Men comics, Sinister has been cloning for X-Men ally-turned-enemy Moira MacTaggert, who formerly had the mutant power of reincarnation, in which her entire timeline is rebooted upon her death, with Moira retaining her lost knowledge and memories into her new incarnation.

Through his genetic manipulations and cloning, Sinister has created a machine that could theoretically allow him to remake the world in his image through the use of the cloned