Transformers - 1984 The Five Faces of Darkness Part 4 3-4 is rated/received certificates of: Australia:G
Transformers - 1984 The Rebirth Part 2 4-2 is rated/received certificates of: Australia:G
Transformers - 1984 The Rebirth Part 1 4-1 is rated/received certificates of: Australia:G
Transformers - 1984 The Rebirth Part 3 4-3 was released on: USA: 11 November 1987
Transformers - 1984 The Rebirth Part 1 4-1 was released on: USA: 9 November 1987
Transformers - 1984 The Rebirth Part 2 4-2 was released on: USA: 10 November 1987
Transformers Prime - 2010 Darkness Rising Part 4 1-4 is rated/received certificates of: Singapore:PG USA:TV-Y7
Transformers Prime - 2010 Operation Bumblebee Part 1 2-4 was released on: USA: 10 March 2012
megatron is not in transformers 4 because he was died in transformers 3
It might be named Transformers 4 Rise of Unicron or Transformers 4 Rise of Galvatron
If by "Is there a Transformers 4" then I believe they've confirmed a Transformers 4... But we shouldn't get our hopes up. I really do hope there is a Transformers 4 though... But... we'll just have to wait and see
As Micheal Bay made the triology of his transformers movies, the 3rd movie was believed that it would be the last in the transformers movie series, but on youtube.com there is a trailer that may or not be a real to transformers 4. This trailer of transformers 4 was called Transformers 4: Awakening of Cybertron.