Well we've seen the hatch testing in Type R guise recently on the 'ring, so that shows how sloped the back window will be. If you look at the 9th and 8th gen hatches from the UK they have the same sloped double rear windows.
I'm excited to see the hatch too even though i'm in it for the coupe. Honda has surprised us thus far, so who knows what they'll do regarding the hatch at this point... my best guess is a year from now. But they could surprise and do it sooner just for the US stores, but that's a big BUT. lol.