Earlier today, Sky Cinema HD posted a article about Winx Club's third movie, The Mystery of the Abyss. In the article, they give us an exclusive look at the Sirenix transformation sequence from the movie, with new scenes that were never shown before!
We can now see the new beginning part with Bloom spinning inside the fire circle (which had already been seen in the transformation leaked before Season 5 came out). There is also a new scene with Flora's tights.