It may survive another couple of years at a push, if/after they stop making them.

Maybe moto3 machines will appear as a re-introduction of the Ultra Lightweight class, although as everything seems to have to be pre-fixed 'Super' I'm not sure what they would call it.

There are also those Supersport 300 things that have been running at WSBK, not sure if they'll catch on, and aren't likely to be the most exciting things to watch on a fast circuit.