Basically, a mod that does little minigames. When one ends, a new one starts. When that one ends, a new one starts, etc.
There could be a GUI in the minigame menu, and it should have a list of minigames to pick.
It should look somewhat like this:
Minigame 1:
(Button here leading to normal minigame menu)
Minigame 2:
(Button here leading to normal minigame menu)
Minigame 3:
(Button here leading to normal minigame menu)
Minigame 4 and so on.
So basically it cycles minigames like team deathmatch and deathmatch, juggernaut and stuff.
Also someone should make a juggernaut mod where there is one person who is very strong while everyone else has to kill that person.