Chances aren't high we'll see Ruby until Hickman is done. Hickman is charting a whole new path for mutantkind. I don't think he's going to touch upon an already established alternate dystopian future (from which Ruby originates), especially since he already created even more of them through Moira's past lives. Also, the timeline may have already diverged enough that Ruby's specific future is no longer possible. Her best shot is probably through an Exiles type of book.