I'm sure we will see something, at least a teaser trailer. Just think about it: we've got this link (bottom) in 2015, two years before the launch. And it wasn't even a numbered episode. If they still need 2 years (so the release goes to 2022), even then we need a teaser. But it looks like we get the game as a launch title (for now), so I won't be surprised if we will get a full trailer.
I think the purpose of the trailer for GTS was because it was specific to PS4. Why they would wait 6-7 months before a game this time is because they needed the hype for GTS to maintain and the current FIA events.