As suspected, the two new bots joining the ranks are Zeta Prime and Dead End. Both are available in four-player co-op Escalation modes in addition to their chassis being available in the create-your-own-bot modes of the game. 

There's also 5 new multiplayer maps, two for Escalation and three for competitive multiplayer.

"Pulse" is an Autobot map that takes place inside Trypticon while "Static" is a Decepticon multi-level maze riddled with environmental traps that can be both a hinderance and a help!

"Horizon" is a picturesque statuary overlooking the city of Iacon with wide courtyards and tight corridors. 

"Sector" is an old Decepticon maintenance facility perfect for the sniper in all of us.

"Metropolis" is set in the clouds as you find yourself in the ruins of an Iacon high rise. 

The pack is currently available on both the XBox LIVE Marketplace (800 MS Points) and the Playstation Store for $9.99