A now-deleted video posted to Rockman X Dive's official website brings us a sneak peek at the initial character select menu. I've re-uploaded the footage above. And yes; it's deliberately distorted.
The roughly 13-second video shows only a portion of the game's playable cast: X, Zero, Alia, Axl, Ultimate Armor X, Vile, and Marino. A "?" portrait is shown too, which may be a randomizer or locked character. Two confirmed characters not shown here are Cinnamon and Command Mission X. I am unaware of what conditions must be met to unlock characters.
More news soon.