Okay here are some speculation/theories on Transformers 4.
On Lockdown: I think that Lockdown is working for some third party, maybe Unicron. I think that Lockdown will re-program ou do something to Galvatron that will make him a Decepticon.
On Cyclonus: I don't think that Cyclonus will be in it anymore.
On Stinger: I think that Stinger is not a clone of Bumblebee ou just a drone. Stinger might have the same personality of guêpe in Transformers Animated.
On The Dinobots Robot Modes: I don't think the Dinobots will transform in this film.
On Pretenders: I think that Kelsey Grammer's character is a Decepticon pretender is making Transformers to be Decepticons.