If you're in the Austin area July 7-9, 343 and Halo will have a booth at RTX 2017, along with holding a panel and hanging out center stage.
Additionally the new Halo Wars 2 mode, Terminus Firefight, will be making an appearance, as well as some Loot Crate goodness. For more information, read Halo at RTX 2017.
Mini-Game Madness, Saturday, July 8 from 2:30-3:30pm (Central)
Halo Match Game, Saturday, July 8 from 11:00-12:00pm (Central)