Didn't I say Yaoroz is coming in the next Jump Magazine? The scan can be viewed here.
Once every 30 years, this divine beast visits the holy light festival. It's highly intelligent in that it can understand human speech. By no means is this beast evil. (It appears this battle may just be to test the party's strength). On the back of it's body it has a 5 story pagoda. Shougai points out that it appears to be wrapped with Wynarl's hair or something.
A new collaboration item with VJump titled, "VJump Barrette" will be included in the Infinity Guide Book. VJump Barrette (Crossbow) is a password item, so I'm sure it will magically appear in the vision phone password list one day.
[via shougai]
Additional Comments
Based on the datamining thread, we have a mission called "Festival Fracas." The kanji of this mission states it's a "Light Festival." Either this is a new field that may have the appearance of the Neudaiz light festival, or it might just be an old area that took place in PSU Episode 2 Chapter 7 "Protect the Festa". We'll see this boss' surroundings once the scan comes out later this week.