If there is an event (and hopefully not the end of UR), maybe what is behind Room 13 is Sakrohm's god or at least an avatar. And the reason Norman and Cortez keep it locked up is out of fear or that it had a hand in their clan's creation and they don't want the rest of them to find out. What can I say, this game has the most awesome story potential.
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).
The Urban Rivals team is made by lovers of all kind of Collectibles Cards Games and Trading Cards Games like: Magic the Gathering, Dominion, Vampire, Yu-Gi-Oh!, Pokemon, Wakfu TCG, Assassin Creed Recollection, Shadow Era, Kard Kombat and Might & Magic Duel of Champions.