Wouldn’t say that much. None of Ash’s Kanto Pokémon that returned in AG returned long term as promotion for FRLG. Could easily be temporary
We should also note that when they do add a starters to the cast (or bring in recurring rival in the case of Shota/Sawyer) to promote a remake it's always in their base form.
True...but it looks like Infernape's about to buck (or burn) that trend.
Even then that leaves the door open for returns by Rowlet AND Oshawott.