Got a little more info on the game from Gameinformer reported by various sources.
http://www.nintendolife.com/news/2017/12/details_emerge_on_mega_man_11_difficulty_options_a_weapon_wheel_and_moreThere'll be four difficulty options. "Normal" will be as expected, but "Superhero" should challenge skilful veterans.
The Robot Masters are former allies of Dr. Light, and this one will allow you to tackle all eight from the start in any order. That's the norm that many are used to, but don't forget that some Mega Man games have split these stages into a couple of tiers, so it's nice to have all eight as targets from the get-go.
There'll be a weapon wheel applied to the right stick, which could mean quick switches between them if you remember which is assigned to each direction. Also, as you can see in the trailer the slide move is back, but the final controls for that aren't yet decided.
The gears seen under the health bar in the trailer and screens relate to "an entirely new gameplay mechanic that will impact Mega Man's moment-to-moment action". Not much more is said on that, but we get a glimpse of it right at the end of the trailer when Mega Man is surrounded by some sort of destructive field, with the gears spinning away in the top left.