Well if you look closely in the background to Ziggs, "Pool Party" skin you'll notice TONS of other Champions. Hell, I noticed Kat within seconds thanks to her scar. I think Riot should make some more Pool Party skins like this one, maybe some of the champions in the background? Maybe if more then one is on a team they get a "Buff" labeled, "Let's Get This Party Started". Just an idea, don't be afraid to bash on it. Lol.

I'm SOOOOO up for this set. xD But it's possible they'd release it during the summer just to go with the seasons. :[]

Summer would be logical