Transformers 4 has a name: Age of Extinction! Hasbro has applied for the trademark of the name and MarkMonitor has applied for the domain on the behalf of Paramount Pictures. Some video game trademarks have also been applied for that could be meant for the movie as well. They are Spirits Rising and Autobots Supreme. The third could be a huge spoiler if it turns out to be related to the movie, so to view it, click here.
Image created by Tunakaan.