Ok, so the writers of NYX emphasized that the "Giant Size X-Men" free comic book day issue was important for Kamal's role in the X-Men books going forward.
The title is a call back to famously a flashback issue where they did the whole "Charles loses the first X-Men team and makes a new one last minute to save them" thing.
And, Deadly Genesis was another retconned about a different X-Men team Charles had put together in the past. . . And here's the thing
Kamala's powers actually involve time manipulation to a small degree. Her polymorph abilities allow her to change her body,l by shapeshift, and alter the density and composition of her body and so on. But, to change her mass and size she has to take and distribute mass across her own timeline. So like when she makes her fists bigger, she's taking a little of her mass across every instance of her existence, and when she shrinks she is giving out her present mass across other instances of herself from that timeline.
Time is a recruiting element in a lot of Miss Marvel books and stories as is her power's connection to it.
Once because of a weird power glitch she accidentally stole the powers, and killed, an alternative universe version of herself.
There's a story where she gets sent to an alternative universe where she hangs around the classic avengers in that version of the past. . . Where it turns out there's a different version of herself that can just like, feely move across universes and time travel.
Back to Timeslide. Cable and Bishop go back to the events of dark phoniex but there's an extra someone that both are surprised to see (they are going through the main timeline in that moment)
. . .
SO! Second Genesis may or may not be a "Kamala gets her mutant powers" story like we all thought, but it's probably more than likely going to be about Kamala going back in time and hanging out with the classic X-Men team for a while because something relating to her powers.
I don't know how I feel about that if it ends up being true. I guess, if that is where they are going with Kamala, I at least hope it's the status quo for a while (like when the teen classic X-Men got brought into the present) rather than something that gets reversed relatively quickly. We've already done the "one off" story where Kamala travels back in time in Avengers First Steps and Miss Marvel Generations.