also since ya'll probably dont know much about this film, might as well inform you guys. heavy spoilers so dont read or w/e
transformers are hunted down by anti-transformers groups (some lead by kelsey grammer), leading to the death of numerous autobots including ratchet. optimus goes into hiding and fully powers down in the old G1 rusty cab. it's found by mark wahlberg with her daughter nicola peltz and repowers optimus. other autobots go into hiding as well, including bumblebee in the old camaro. after this, we don't know anything specifically plot-wise. there are confirmed human made transformers, Stinger (red pagani) made by stanley tucci, and possibly galvatron. decepticon bounty hunter Lockdown (lambo) captures optimus prime at some point and held captive in his ship. the dinobots do rescue him later on. bumblebee also gets a new alt/robot form (new 2014 camaro) and copies Stinger's robot mode. optimus also rides grimlock at some point.
confirmed autobots:
optimus prime


bumblebee

drift

crosshairs

hound

ratchet makes an appearance
confirmed dinobots:
grimlock (t-rex)
2 headed pterodactyl
2 raptors
triceratops
confirmed decepticons:
galvatron

lockdown

stinger (man-made transformer)

if theres anything else, ill post it.