Call it Allies v Axis cos that's exactly what it is.
Newbie downloads the game, doesn't read the help file cos...well who does? Doesn't find the forums either cos.....well who does until someone tells em to?
Logs in sees.....Main Arena with loadsa people and Combat Theatre with.....um.....not as many. What goes on in there? No idea.
Call it Allies v Axis and people who have no idea what it is suddenly will.
Call it the Scenario Theatre as Lowe suggested and it'll suffer the same I-don't-know-what-it-is syndrome as the CT and cause havoc the next time the Special Events Team runs a 'scenario'.