Pete Hines says it's [RAGE] not atop the agenda right now but they're "looking at doing some things" with it; its future is "still TBD." When gamers talk of id the "first thing" mentioned is Doom 4.
http://www.strategyinformer.com/news/18525/its-bethesdas-hope-and-intent-rage-will-become-big-ip-for-id-software