The era ending in this lengthy cinematic trailer is that of Final Fantasy XIV, as Square Enix pulled the plug today on the game's servers in preparation for Final Fantasy XIV: A Realm Reborn. The MMO relaunch was said to be "rebuilt from the ground-up" when the not-exactly-new game was announced in July.
The Eorzean Alliance battled the Garlean Empire before further chaos engulfed the "end of an era" trailer, seen above. Like it or not, Final Fantasy XIV certainly went out in style. Both the PS3 and PC versions of A Realm Reborn are expected to launch in 2013.
Source - joystiq