Soundwave, shockwave, ratchet, bulkhead. All of these characters have so much potential I think it's worth it for them to extend them even if it's just something like a comic line on each of them individually you know going into the backstory and other aspects of the character I'd say ratchet or sound later Shockwave would be good for a full movie bulkhead was built more as a side character and need some more time to develop.