Spaghetti wrote: Important to remember, the trailer makes it clear it is composed of WIP materials. I don't think they're quite done with what they have planned yet. In some of the screens you can see a mix of high and low res textures even in the environments.
If Sega is announcing the HD versions now, then release is most likely 6 months away. This means that we are probably looking at an October release. Shenmue 3 won't be out until sometime in 2019.