Nintendo stated they wouldn’t talk about the Nintendo NX until 2016. If I had to forge a guess I would say we could start hearing something during the March Nintendo investor meeting. 

Earlier this year Iwata claimed the NX would, to put it simply, do something different. According to an insider source to Nikkei, Nintendo has plans to make the NX OS Android based.

Right now the Wii U and the 3DS are plagued with a slow OS. Using an Android based OS should help in creating a unified interaction. Also, Android is already a heavily developed platform making third party development easier which, according to the source, is a big concern for Nintendo. 

It’s all rumors, but exciting ones. 

Source

Update: Nintendo released a statement about said rumor that strongly rebukes it.

“There is no truth to the report saying that we are planning to adopt Android for NX.”

Source