not just you speculating.... a lot of people have the same thoughtsWTT is every two years, so theoretically Alexa and Brandon could compete next year. She has made no announcements.
If I were a betting lady, I would bet this is their last comp. (unless they "Pull a Jason" ). Brandon appears to be staying in California (a junior pair mentioned training with him in an IG post.) Chris is the full skating director of a rink in Chicago as of this year, and I can't imagine Alexa living apart just to train for another GP season. But that's just me speculating.