Well, as I mentioned before. Recapturing the level of nostalgia will be hard. To some fans out there, it didn't even matter if the movie was good. Just the fact that Optimus was on the big screen was enough. Now that the TF's are old news, and we all know what they look like, the next film will have to hold our attention. It'll have to be 'good'. As for that level of nostalgia I keep bringing up, well they can probably still have it linger around by introducing fan-favorite characters like Ultra Magnus and Galvatron.