According to a report from Kotaku, anonymous sources suggest that Respawn’s game will come to Microsoft’s next-gen console and to Xbox 360, “but no versions for rival PlayStation and Nintendo consoles.”
The new Respawn is supposedly called Titan and will be made on a modified version of Valve's Source engine, not on internal EA tech or on Id Tech 5/Unreal Engine 4. (The IW engine was originally based off an Id Tech engine.) The 'source' also says that Respawn is only working on the Durango version of the game and is hand-picking a studio to make the 360 edition.
The report calls the title “multiplayer-centric” and “designed for multiplayer,” with sources suggesting that “the game is always-online.” (Because after Ubisoft, Diablo III and Simcity, who doesn't love always-on DRM?) This tidbit seemingly confirms recent rumors that the next Xbox will require a constant internet connection and the sources “did not think that the game would have a standalone linear campaign.”
The 'source' describes the game as a battle of Davids and Goliaths. The Davids are heavily-armed foot soldiers. The Goliaths are the giant exosekeltons or "Titans" that these soldiers can pilot. These Titans are big mech-style walkers that move, "with an agility not seen in games like Mechwarrior or Steel Battalions."
So, Westpella's next game is supposedly an Xbox exclusive. Again, this was taken from a fairly hard to read article on Kotaku, so take it with a pinch or twelve of salt.