Looks like it is official, the War For Cybertron game and the Rise of the Dark Spark game are now also both removed from the multiplayer servers... which I think is now all of the Transformers games on Playstation & Xbox that had online/multi-player portions of the games.

I have fond memories of many many many hours spent playing the multiplayer games on WFC... it was one of my first games for the PS3, and the first PS3 game that I managed to get all trophies completed.
I'm really going to miss the Escalation games on WFC, particularly because they could be played on your own on WFC, for hours (it wasn't possible on the FOC game as their maps didn't have any hiding spots, so you needed other people to play with you).