When will Nintendo officially reveal NX?

[Miyamotoo]

Soundwave said:

I think it's a tricky situation for Nintendo because unsold Wii U deadstock inventory could bite them in the ass hard as it's still a $300 machine.

This isn't like the GameCube where it was a $99 cheap piece of kit by the end of its product cycle and if retailers were stuck with unsold inventory, $99 was already close to a clearance price as is, but with Wii U, either Nintendo eats a fat loss to sell those remaining units or they piss off their retail partners and force them to be stuck with Wii U deadstock and to have to eat losses, which in turn will likely make them reluctant with the NX. 

Nintendo probably wants the bleed their Wii U stocks dry further, I suspect something will come officially this month in the way of an announcement but possibly no formal unveiling until E3, where you actually get to see the system and games.

I dont think they have big stock of unsold Wii U consoles, Wii U selling bad from start so definitely Nintendo didn't made huge stock of Wii U, and we already saw Japan had problems with Wii U stocks.