It'll be Aces.
http://www.nintendoworldreport.com/news/46614/nintendo-direct-to-air-march-8
The next Direct has been announced, and no Chibi Robos were set on fire in the process.
A Direct with Switch and 3DS announcements will air tomorrow (March 8) at 5 p.m. Eastern time (2 p.m. Pacific, 10 p.m. UK time). According to the Nintendo of America announcement, the Direct will be approximately 30 minutes long.
By the way does everyone hop on Discord during the Directs to chat?