basically the game should have the randomizer dm's selection of weapons, albeit probably a bit more balanced and with a bunch more low-power weapons [it's not hunger games when everyone finds a MAS and a minigun]
as for other things
if you're gonna go with the death cannon boom thing, you should probs disable death messages to make us actually keep track of deaths via it
the map needs to have lots of variety and a lot of specialised triggers and special controls for making it less of just a DM and more of an actual hunger games