that story from MLID about panther cove being cancelled and replaced by cougar cove doesn't really seem real. I think panther lake was always supposed to use cougar cove, raichu already leaked it last year. Panther cove is still probably coming after cougar.Because a similar thing with Panther Cove happened with Ocean Cove, where they canned the architecture and started work on a new one. And if that precedent with Ocean Cove continues, the new 'cove', cougar cove, would look to be just a minor update of lion cove, maybe on a new node.
I think @Exist50 said sometime ago that both Royal core and Panther Cove might coexist with each other so maybe we are going to have 3 microarchitectures in one product with Royal being the "Extra big core", Panther cove being the big core and atom the little core just like ARM CPUs.