Gravity the Ghost on Twitter has made some pretty compelling points and has probably provided one of the best (and only) logical theory about the rumoured Nintendo Direct.
He believes that Nintendo is just going to drop a Nintendo Direct with either little proper announcement or none at all. His two reasons for this are in the form of both of Nintendo’s tweets. Firstly, the flaming Chibi Robo tweet from @NintendoAmerica is linked to the fact that this game was announced one one of two Nintendo Directs that went live without an announcement.
If the Nintendo Direct is going to happen sometime in the next 24 hours (it was rumoured to take place on the 11th in America), then it’s almost certain that it’ll either drop out of nowhere or have a very little announcement. I’m not even sure a lengthy announcement is even necessary at this point with all the teasers that Nintendo has been putting out there.