This is only my guess, but I think it will come be something like this:
AMD will introduce 2 cards that will be their new middle class. One card will be around RTX2060 performance and a second higher middle class card which will beat the RTX 2070 by a little but not reach Radeon 7 or RTX 2080. At a later point (pretty sure not in 2019) they will also introduce a high-end Navi, which will beat the RTX 2080 but will stay behind the RTX 2080Ti. I think all Navi cards will feature somewhere between 9 and 12 GB GDDR6. Pricewise we don't know. 7nm is still very new and gpu chips are large...I think it will be a time before the smaller manufacturing process will be cost effective with large dies. The main reason why Nvidia didn't use 7nm for the Turing chips was that yields in the 7nm were just not good enough yet.
But no new Navi cards will show up before October. At launch I am sure they will have a card that will be faster than RTX 2070. But I don't think they will have one that is faster then the Radeon VII.
Again, this is only what I think based on news, rumors and based on what I would do if I would be AMD from a Marketing perspective. I mean, think about it. They just released a $700 card that just barely competes with the RTX 2080. There is no way they will throw a Navi card for less money with more power on the market just 6 month later. They would really anger their hardcore fans who now buying the new Radeon VII for at least $700.
And if you need a new card for Cyberpunk 2077 than you can relax anyway. I don't think we will see this game before the end of 2019 (maybe in the last quarter of 2019) but more likely February or April 2020.
In what resolution do you usually play?