NOPE, STILL ALONE: So, that weird fifth nominee for Original Song--"Alone Yet Not Alone?" It's been disqualified for campaign violations at the nominating level. Unclear if the nomination slot will be filled (Coldplay, Kings of Leon, Lana Del Rey, and Ed Sheeran all were snubbed). If one were cynical, one could say that this clears the way for a potentially pretty hip and fun set of performances of Song nominees--U2, Idina Menzel, Pharrell, and some combination of Karen O/Scarlett Johansson/Arcade Fire.
ETA: The Academy will not be having a replacement nominee. Assuming U2 is willing to perform, this would seem to make song performances pretty likely.