Will we ever see XCOM FPS published? It’s hard to say, at least with the XCOM term in the title. According the last rumor, Take-Two had rebranded the game to The Bureau deleting any reference to XCOM.
XCOM FPS was first announced back in 2005. Since then, the project has gone through several studios. 2k Marin is the actual developer, the game is set on 1962 and puts player in the role of an FBI agent.
These domains would fit (partially) with the XCOM FPS title (year 62).
Thanks to Gematsu.