An interesting snippet from a larger article on Transformers the Ride posted on LATimes' Hero Complex gives a small insight into what lies in store with Transformers 4. Apparently Transformers 4 will feature a redesign of the robots and an entirely new (human?) cast. Michael Bay has also said that he intends for this movie to be his last, to set things up for "the next guy".
Granted, we have heard that before, because in the production of Transformers Dark of the Moon, Michael Bay had stated he intended that to be his last, and even before that, during Revenge of the Fallen Mr Bay had said he intended to take some time out before making the third movie. Neither of these possibilities materialized, so take this claim that Transformers 4 will be his last one with a pinch of salt.
That being said, how does a redesign of the robot cast grab you? Dark of the Moon already featured a move to more "heroic" proportions on Optimus Prime with his new abs - will it be a case of more tweaking of designs familiar to audiences the world over, or perhaps a more dramatic shake-up?
Be sure to check out the full article on LATimes
. While it is mostly about Transformers the Ride, it is well worth the read for the information on the reception to the ride as much as it is for the hint at Transformers 4 taking a different direction.