So I and a lot of other people have been pretty anxiously waiting for that savory new colorful flower mage. They haven't given us a new champ since Pyke so it's been half a year now since.
Looking at Riot Reav3's comments he did state the colorful mage was scheduled to be released before the end of the year, and if we look at past trends we start to see a heavy likelihood that the new champ will be released on the PBE in a November patch.
My money is a teaser this weekend or early next week before the champion is released on Nov. 7th PBE.
That's just my speculation, what is your guys's guesses? :)