According to the dats, there's no room for a new event unless it takes place in the only areas still locked which are Castle Zvahl [S]/Glacier[S]/Xarca[S] etc.
So far every zone that's to be out in the expansion has came on the installation CD of the game, this was true for all expansions so far (CoP even had dyna zones x 3 on install). Mobs on the other hand weren't, they had to be downloaded via update.
So unless they change something with this expansion by allowing us to download zones, I don't see an area to stick in or unless it's in the locked areas. But I'd love a new dynamis personally >_> CoP style but with real drop rate and real coin count
