The timeline there may be a bit weird.
The overall event pattern is similar to the Odyssey events, with bonus rolls for chests unlocking time-limited skins. Only two skins are on display now, but three more are promised, with one of them possibly a reward for unlocking the first four (based on the pattern of other events). Whether you want to get in on the sun goddess action or not, there’s plenty of new stuff arriving with the the dawn this time around.
Hi-Rez also released an infographic in the wake of its recent tourney; we’ve included it below.
Source: Official Site, press release; thanks to Sorenthaz for the tip!