According to latest reports AMD might release Vega based GPUs as part of the RX 500 series, with both Vega 10 and Vega 11 based chips as part of the new lineup. Already during last CES 2017, it became very clear that with Vega AMD has performed a complete overhaul of the architecture.
AMD might prepare complete line-up of new cards based on Vega 10 GPU and a Vega 11 GPU, which the first taking care of the high-end segment and the second dealing with the mid-range part. Cards based on both chips are expected to belong to the RX 500 series. On top of that AMD wants to refresh their Polaris GPUs featuring 14nm transistors and therefore better energy efficiency to then address the low-end market with those cards.
Right now it is rumored that the RX 560 will be based the Polaris 11 architecture. This new model should feature a fully-fledged chip with interesting TDP levels and high clock speeds. Vega 11 is expected to replace Polaris 10 but at the moment there aren't any more details. At GDC 2017 AMD will make several new announcements during their Capsaicin and Cream event scheduled, which both have been scheduled for February 28th.
Source:
OC3D