Shun in Gokusen movie!

Well, initially, there were rumors that Shun will come back for the upcoming Gokusen movie, although he was never officially confirmed...and since lately, the only "old" cast member from either of the previous 2 seasons who has been heavily promoted for his return is Kamenashi Kazuya from the popular boyband KAT-TUN...I just assumed that Shun would not be returning, since there was NO 'official' announcement of him or any of the other "rumored" cast members coming back..at least, I personally didn't come across any confirmation.
So imagine my shock when I saw the recent trailer of the movie, and sure enough, Shun appeared! So did his co-star & friend in season 1 Narimiya Hiroki who played "Noda", and Ishigaki Yuma who played "Minami"! Waki Tomohiro who played "Kuma" is also confirmed to return, the 4 of them are back! Yay! They'll all be reprising their roles in the movie. The only character missing from the main 5 original students is Sawada Shin, Matsujun is still missing from the cast list, there's a great possibility that he won't be returning at all...then again, we wouldn't know for sure, perhaps his appearance is meant for a big surprise? After all, I don't think many expected Shun, or any of the other 3 original guys to come back...lately, only Kame's return has been promoted heavily, so all along he's been known as the only "old" cast from the previous 2 seasons to come back, while everyone else's existence in the movie has been very low-key...I'm guessing maybe their roles are too small in comparison to be heavily promoted.
We'll just have to wait and see to find out if Jun will return...I hope he comes back and joins his original 3-D gang *fingers crossed* But if it turns out that he doesn't return, I'm still happy that at least all my other favorite casts are back! SHUN, Kame, Hiroki, Yuma & Waki! I'm really excited about this movie!

here's the official trailer I saw with Shun, Hiroki & Yuma:


they appear starting at 1:11.