No, seriously, this was a thing at one point and I want it to make a comeback. Just imagine it: Marvel's making all these moves right now in preparation for the “original” Jean to make a comeback and instead of the 90s blue and yellow suit or the green bodysuit and gold sash of the classic Phoenix costume we get this...
Wouldn't that be glorious?
Okay, this is mostly just me trolling but I think there is something to be said for bringing back Little Miss Perfect in a slightly different form, especially as the younger Jean Grey is largely just the same character but a bit more assertive. The other original X-Men have pretty big differences between their time lost selves and their modern day selves (being less dead; being less evil; being more confident in their gayness; being Doctor Strange with big feet) but the difference between the two Jeans seems to be little more than the younger Jean is reaching some deep, personal realisation a bit sooner than the original did.
So what would be a better way to distinguish the two than to give one of them massive hentai tentacles?
Let's face it, boys, Logan would still be into it.