User blog comment:Ragemutt/A mysterious picture./@comment-5556439-20131010221946/@comment-5331854-20131011093018

Siiiiiiiigh...

To quote CertainlyT (before the Release of Jinx):

"My next champ will be storming Summoner's Rift directly after our next addition to the League. GypsyLord's second champ stole the spot ahead of me."

And to quote Meddler:

"The gameplay design on Ao Shin is being done by a designer who's been with Riot for a bit but hasn't previously released a champion though[...]"

Designers who haven't released a champion are Lyte (unlikely, since he's the Lead Designer of Social Systems), Nome (likely) or Xelnath (less likely than Nome, but more likely than Lyte, since he's busy with the reworks of Xerath and Yorick).

Notice that neither one of these are CertainlyT or GypsyLord, so there is AT LEAST one more champion before Ao Shin will be released.