I would agree, but it's definitely a scenario we need to consider.
I would absolutely HATE to see Star Tours go (and would hate it even more if that meant the new expansion would really only be one "new" attraction) but we also have to remember that even the new version of Star Tours would 8-9 years old by the time this expansion goes live.
Besides, and I have literally zero info on this, it sounds like it would just be a new version, the basic ride would be the same.