So the main streets, Hollywood Boulevard and Sunset Boulevard, The "Hollywood" Brown Derby, Echo Lake (based on the real location in LA), The "Hollywood" Tower Hotel and the Chinese Theatre have nothing to do with Hollywood?
That has always been the best part, in my opinion, of MGM/Hollywood Studios - the "old time" Hollywood look and feel of the front part of the park (especially all the neon at night).
I would think they would keep the theming of the front of the park since it is so elaborate. (Though the Echo Lake area may see the boot .. i doubt Indiana Jones (or even Star Tours) will live long after the two new lands are done).