Tiberium. According to a report on Kotaku (we've verified with EA), development on the game was suspended due to its inability to meet "the high quality standards set by the team and by the EA Games Label" before its post-delay fiscal 2010 release.
According to EA's Mike Verdu, "The game had fundamental design challenges from the start. We fought to correct the issues, but we were not successful; the game just isn't coming together well enough to meet our own quality expectations as well as those of our consumers."
Though we're glad to be spared from any game that clumsily crashes into EA's recently lowered Limbo pole, Tiberium's cancellation will reportedly result in several members of the development team being "released." The publisher claims that it "will make every effort" to move "talented people" to other, actually-coming-out projects.
Update: We've added a full statement from EA's Mariam Sughayer after the break.