Judging from the log-in bonuses (the ones with the ticket that is divided into Bronze, Silver, Gold), most likely next event is Luna Colosseum after this one, which means we're two events behind the Japanese version. Right now, they're doing Fullmoon Party - Transcend Gate.
This was the LR card that was introduced in the Luna Colosseum event: http://image02.w.livedoor.jp/r/k/ragna-break/0c913118d84fad6a.jpg
On another note, I do hope CROOZ would also bring over Dragon Break and Knights of Avalon (set in the Deity Wars world as well).