I don't know if it's going to be the result briefing or some sort of direct but the 27th of April would match the timeframes.
;D haha
Well, if it's the financial results announcement, we sort-of already knew we would've had something about NX, just like we had something about 3DS before that (due to an incoming Nikkei major leak, IIRC) and just like we had "something" about Wii U right at April 2011's financial results. I mean, it's when Nintendo will announce the forecasts for the next fiscal year, so it's quite expected.