Tipster @Olrak29_ shared consolidated specs for what appears to be AMD's successor to the RDNA2-based RX 6900 XT. The purported RX 7900 XT is set to feature dual GPU dies connected by Infinity Fabric, for a total of 15360 shader cores.
https://www.notebookcheck.net/Tipster-outs-new-details-about-AMD-s-purported-RDNA3-based-Radeon-RX-7900-XT.552641.0.html