Do I just go to the same place as older game request? I want to request some games that are in development.

I want to buy a car without wheels, steering wheel, seats or gas tank. Where can I get that? It's gonna be AWESOME!

I'd say just create regular wishlist entries. I don't think there's a separate section for In-Dev games. Just make sure to check whether entries for those games already exist. There should be a search feature.

Once you've created your wishlist entries, feel free to "advertise" them here, or in a new thread, in case others would also like to buy those games here.

Also: 2Pac! Not helpful. Also, not accurate, since those "cars" are generally quite functional, and will eventually be nicely polished -- or at least that's the plan. KONA and The Long Dark turned out to be fun rides. :)