About Season 5

Yeah! Season 5 will be aired soon.

Trailer
In 2011 a trailer was released showing Bloom briefly summarizing all her adventures and how she found herself and her "families" from Season 1 to Magical Adventure and showing possible scenes from Season 5. From this trailer it can be seen that:
The Winx girls will have a new transformation.
It is to be noted that just before the girls were seen in their new transformation, they were seen in their Believix outfits while they returned back to Enchantix in the last episode of Season 4.
The Season will partly take place in an underwater Realm where everything takes another dimension. 3D CGI animation will be used for scenes taking place in this Realm.
The Trix will be back as antagonists, possibly as allies to the new Season 5 villain.
Green-skinned mermaid-like creatures were seen attacking the Winx. They are probably servers of the new villain named Tritannus and/or allies of the Trix.
However, Roxy was not shown, and it is unknown if she will be together with the Winx girls fighting against their new enemy or if she will be at Alfea as a student, only making guest appearances. That Roxy would be present as the 7th Winx was however officially confirmed before the release of this trailer by Rainbow.

Source: Winx Wikia

Transformations
There's seems a lot fanmade pictures, drawings etc. But, now this one is real! In Google images, maybe we can just find Bloom's Sirenix's transformations.

Source: I wrote it myself

Episodes
1. Water for fire
2. Coming soon
3. Coming soon
4. Coming soon
5. Coming soon
6. The Magic Union
7. The Sirenix Song
8. Coming soon
9. Coming soon
10. Coming soon
11. The Domino Ceremony
12. Crossing the Sirenix Gate
13. The Pillar of Light
14. Coming soon
15. The Sun Shines Again
16. Fairies Inspiring Eye
17. The Selkies Devourer
18. The Shining Whales
19. Love Problems
20. Coming soon
21. Listen to Your Heart
22. Coming soon
23. Coming soon
24. Coming soon
25. Coming soon

Source: Winx Wikia

The Episodes names are too "Girly"

True