It looks like ASUS is preparing a new brand of graphics cards, completely separate to their gaming-focused Republic of Gamers (ROG) brand, exclusive for AMD and their Radeon family of cards.
VideoCardz reports that ASUS is preparing a new AREZ brand for Radeon graphics cards, where they might not even be branded as ASUS at all. There will not be an AREZ ROG STRIX graphics card, it would simply be AREZ STRIX, we should also see other sub series including the AREZ branding including Phoenix and Expedition.
It's an interesting move, but if NVIDIA is forging ahead with its GeForce Partner Program, I'm sure one of their biggest AIBs (ASUS) would want to stay in NVIDIA's good graces and continue pumping out GeForce GTX series graphics cards under its strong ROG brand.