It's targeted for a November 2020 unveil[0] so we'll have to wait to see what they're coming out with, but I doubt it'll stack up to the 30xx series on both price and performance (at least, based on these marketing slides).
It has to be out before the new consoles, which are reportedly coming the first two weeks of November. I think the consoles are being kept secretive on AMD’s request as well.
0: https://www.techradar.com/news/amd-big-navi-isnt-coming-unti...