Even though some people *Looks above* have stated that it is being produced in America by Nick, (Using Wikipedia as their source. Which you should NOT listen to.) it seems that Nick is just making their own version of the show. (Not season 5) Though people have claimed that Nick is making season 5, it is highly unlikely.
My reasons, are just from my common sense:
1. With the way Nick is producing Winx, I highly doubt that they will be able to produce a whole NEW season. With the rate they're releasing the episodes, it could take longer than that to see episode of "Season 5". Plus, the way they have made the show is very poorly done. I don't think they would be able to think up some fresh new material like the originals.
2. The show was in the U.S in the beginning. I see no valid reason as to why bring it back, entirely different. If girls in the U.S even remember the old show, they'd be confused at the new version. (Voices have changed, plot has changed etc.) Plus, I highly doubt the first episode was a big success either. I think they're even going to put kids off of watching it, from how many times we see the "New Episode" add on Nick.
3. Four seasons have been made, why must there be a fifth? Sure the "Winx Club" is a big hit in Europe, but you barely see anyone in the U.S talk about it. Bringing it onto Nick to try and attract more female viewers was just stupid. There are enough cheesy girly shows on that network, and adding a fucked up "Winx Club" will only increase the girls boredom. Nick's ruining the first season, why should they bother making a fifth, when their VERY FIRST WINX EPISODE was terrible?
These are MY reasons, and I stand by them. I don't think season 5 will air, and I hope it doesn't air. If it does, Nick needs to get bitch slapped.