We're all hungry for the next Nintendo Direct. The stretch of time between the last Direct and now has actually been the longest-running stretch between Directs since they started! When on earth is Nintendo going to break this streak? Rumor has it that Feb. 13th, 2019 is the lucky day.
This info comes from King Zell over on Resetera. King Zell has an insane track record with leaking Nintendo details, and has been spot-on with his teases time and time again. It's very clear that he's in-the-know when it comes to Nintendo inside info, so this tease definitely comes with a bit of credibility.
As for what to expect from the Direct, King Zell says that Metroid Prime Trilogy is quite likely. On top of that, Zell goes on to speculate what other games might get a mention/reveal. According to Zell, Nintendo has titles like Pikmin 3, Super Mario Maker 2, BoxBoy, Pokemon, and a 2D Zelda to showcase. There's also some other Japanese third party titles to look forward to, Zell says that Japanese devs are stepping up their game.
Just to be clear, the only game King Zell feels sure enough to mention as part of the Direct is Metroid Prime Trilogy. The other titles he indeed believes to be in development, but has no idea when they'll be showcased.