Guild Wars 2

The Colosseum is a zone in PvE map where players can participate in Gladiator style matches. There can be PvE and PvP confrontations on a smaller scale then the normal sPvP.
In this Colosseum you can run around the zone but you can’t be attacked or attack anyone until you specify personally to do so by talking to different NPCs
The Colosseum will have more Arenas, each one specific for a different game mode.
Some game modes will be:
- Survival
- Challenge
- Obstacles

Here is clip to give you a better view of what I have in mind. Take away the violence and the movements and imagine this in GW2 style

i like your thoughts..

Well, these arenas can be the start for implementing player generated content. The players can add presets of different types of traps in different layouts and routes and also add the sequence (timing) of incoming foes or even what type of foes to add for PvPvE modes.
One game tupe in survival mode can be mixture of PvP and PvE where players will have to fight eachother and also the foes coming to attack them both.

Like you saw in the clips above, the spectator players can cheer up for the fighters and so they will give them buffs. Because the spectators will be only players, they can cheer up for any of the combatants and these cheers can be seen and heard
The stadium atmosphere is a must in this games
Also, for these games players can have different looking armors, specific only for here.