Ehem, if i recall correctly, there was a spanish event that involved Naja Ld
before she was released. So you can't really say no events are canon.
About the teasers, well, i don't know what's going to happen, but it's not going to be Fantasy Rivals' release, not 2 days after i finally got my Xuul Ran!! (FR also lacks some functions and is too buggy to be released yet) (Xuul Ran is like FR Dj Korr, 7/3 5* -3 pillz min 3 -20 atk min 14).