Is there really a point towards having a third Rotom? Just feels pointless introducing another when Ash is already good friends with a Rotom right now, Rotom even gave up his dream to be with Ash! Rotom doesn't really have any connection with any other SM characters like he does with Ash, leaving him behind would just be bizarre
Besides, I doubt his role will be much different than it is now. Just a talking Pokedex that scans stuff so Ash doesn't need to scan a Magikarp for the umpteenth time. I can see how Rotom can be annoying, but I'd say he and Bewear were necessary changes that helped make old characters fresh, I hope both get to go to Galar. Bewear's den gets blown up and she tries finding a new den... only to discover her kids have run off, leaving her to chase them to Kanto and eventually Galar, where she finds a new den in the Wild. If you thought current Bewear was broken, just wait for Gigantimax Bewear!