Hi Ubisoft

I really enjoyed the arena, the weapon challenges, endless mode etc.
First of all it'd be awesome if you could make more arena maps, one is not enough.
Adding new weapons would be awesome too, or maybe make the signature weapons available for the arena.
Moving on - in the endless mode it'd be great to make enemies tougher, bigger variety of the enemy classes (why not add mercenaries from Far Cry 3, they sure as hell would participate in such an event) and the most important - make them use lethal weapons, like, for instance, grenade and rocket launchers (maybe add a rocket arena like in Quake III), MG42 (that one's a must), Barrett rifle, other assault rifles than ak47, m4 and bz.Shotguns such as spas, submachine guns such as Vector. You get the idea.
Add more lines for the announcer and maybe even add different announcers.
Lastly - Rank 15 - more ranks! You can hit the highest rank too quickly.

Come on - you did the menu for choosing which arena you want to play - that means even you think there should be more.

Cheers