http://www.gamespot.com/articles/nin.../1100-6444626/

Nintendo has confirmed it will broadcast new details about the company's next big console on Thursday, October 20 at 7 AM PT/10 AM ET/3 PM BST.
the company will release a three-minute trailer for the NX. As of yet, we don't know if we'll see games, hardware, or both. Notably, Nintendo calls the announcement a "trailer" and not a full direct presentation.

Same day as the RDR 2 trailer. Odd, but it is Nintendo.