U mean a stage that we WON'T be getting .. EVER? It's breaking my heart. They get some pretty awesome advanced stages and all we get are these lame events, failed maintenances and continuously broken promises(ahem Guilds late JUNE or EARLY July, AHEM again Seraphim's Mace).
To discuss the stage now: IT LOOKS AWESOME. I was gonna say it sorta looks like that one stage from Get Amped 2 and maybe a little like the headquarter stage from Lost Saga. Either way, a LOVELY stage.
It doesn't look very small. I was thinking like that one Arena stage that escaped my mind at the moment I wrote this.