They've announced the Fremen as a playable side (not really a surprise) and the early access release date (April 26th). https://store.steampowered.com/news/app/1605220/view/3226274327488059663
I wasn't paying attention to the entire Twitch stream but I did hear them say something about there not being many vehicles, at least not in the initial game release. I wonder if the variation between the different factions will come more from building or diplomacy than with units.
They added another post on House Atreides including some of the units: https://steamcommunity.com/games/1605220/announcements/detail/3140698954406047785
They've got an FAQ out that answers a bunch of questions. For those interested in the game it is worth a read: https://store.steampowered.com/news/app/1605220/view/3146327276141395840
I've also read, forget where now, that Villeneuve wants to make 3 Dune movies to cover Paul's entire character arc. Which makes me wonder if that would include Children of Dune and not just Dune Messiah.
When you past the link and it converts it to an embed there should be a line that appears at the bottom of the input box that asks you if you want to make it a link instead.