User blog comment:Princess Moonlight/Season 6 - July news/@comment-24084337-20130712165717

"Slated to premiere in the Spring of 2014. The trailer is to be shown in October 2013. Like the previous season, this season will be both 2D and CGI. The first episode title has been confirmed as "Inspiration of Sirenix" and The Pixies, who were absent from the previous two seasons, will be returning in this season. Daphne, who finally had her physical body restored to her thanks to her sister Bloom's Sirenix wish in the previous season finale, will also be returning in this season. The third movie is expected to premier in 2014."

Fount this on wikipedia also look at this http://winxclubwebofficial.wikia.com/wiki/Season_6 looks like rumor!