User blog comment:RoyallyBella/Official Season 7 discussion blog/@comment-26448417-20151118145011/@comment-5875378-20151118221449

It was confirmed by Iginio Straffi that the fourth movie will be released in 2017. We don't know the synopsis at the moment. Word of Winx will be a spin-off series incorporation with Rainbow S.R.L. and Netflix. There will be 2 seasons with 13 episodes each season. Here is the synopsis:  "The Winx will embark on an undercover journey all around the world looking for talented kids in art, sports, music, and science. These kids have their own kind of magic, and the Winx Club fairies are enchanted by them though it doesn't take long before trouble sets in, and a new and dangerous mystery for Bloom and the others to solve." It will premiere globally on Netflix in Spring 2016.

Also, this question should have been posted in the 4th Movie and WOW discussion blog.