Guild Wars 2 Silenced Assassins

With guild halls coming out figured this be good way to keep track of ideas, For arenas we'll be able to edit them and they have a variety of other special options we can enable. Looking for ideas of stuff to do in them so far we've thought of

Asuran Soccer.  1 Asuran is invuln and we get hammers and pushback/pull skills and knock him around like a soccer ball into goals.

The Clone Wars. Free for all Mesmer madness everyone against eachother, **** ton of mesmers, clones.  be great lol

Yeah I was thinking that might be a possibility. Not sure though