Leaks are showing the GW8 Classic in silver with black inner bezel (outer is also silver) or silver and white combo, which looks nice but just not my style. Personally, I would like to have seen an all black version like they've done for so many years but doesn't look like that's going to be an option this year.
Otherwise, the Ultra seems almost unchanged, other than new color variant - blue (also not my style). The standard GW8 has the new Squircle design (Classic has also but not as pronounced) and honestly I think it's the best looking one in the bunch.