Will she be back in the Twin Peaks reboot?

That's what I was wondering. Then, her character was pretty inconsequential in it. Only way I could see her fitting in is taking Josie Packard's place as an older femme fatale, maybe with Dick Tremayne in a Catherine/Pete Martell kind of relationship.

It's not a reboot.

A reboot is when you start things all over and not acknowledge the first series/film/whatever; this is a continuation.