Yeah you can update the episode list. I also read the news about the third season. However I've renamed the episode list for Robots in Disguise as your name was inconsistent with the names of the other episode lists.
Why was "Transformers 5 (film)" deleted? They officially announced "Transformers: The Lats Knight" to be the next Transformers film, and you COULD have just renamed it. Not to mention you never set up a talk page to discuss if it could be deleted.