Nintendo will air a special Nintendo Direct focused on Splatoon 2 and ARMS tomorrow.
Nintendo has just Tweeted a message teasing a new Nintendo Direct scheduled for tomorrow, that will talk about upcoming Nintendo Switch titles Splatoon 2 and ARMS. The special livestream will take place on April 12, at 3 PM ET / 6 PM PT, and you can watch it right here on Nintendo's Twitch channel.
Both ARMS and Splatoon 2 are scheduled for release in 2017, but we don't have any more of a specific release date. Nintendo previously said "Summer" for Splatoon 2, but hopefully the Direct will give us something more solid.