Here's another interesting rumor. A leaked slide that reportedly originates from a Gigabyte AORUS X470 motherboard presentation hints at a future Z490 chipset from AMD. VideoCardz writes there's not enough evidence at the moment to confirm this is real, and we're a bit puzzled why AMD would make things even more confusing by using "Z-series" branding for this chipset.
If it's real, it looks like a beefed up version of the X470. The main new thing appear to be four additional PCI Express 3.0 lanes.