I do hope the rumored names are not correct though but considering AMD took similar Intel chipset names only one gen ahead I would not be surprised if they are planning on doing the same in the GPU market.
I don't care which manufacturer, Intel or AMD they are both stupid when it comes to motherboard naming
For instance A320, B350, X370
Why change both the Letter AND the number? If you change just the Letter eg A350, B350, X350 - no need to change the numbers. If you change the numbers, No need to change the letter, eg A320, A350, A370 - this makes so much more sense, then the revision would be the LETTER going up.... Anyway gripe over.
As for Navi and other rumours, they will be out in Q3 this year, according to Guru3d website posted today....