This sounds truly badass, is it just a concept now or has it started scripting development?
I really love how it uses it's own weapons and stuff, so it isn't pay2win like the rest of Era.
IMO there should be rewards based on how many people are left when you die, for example if 300 players are playing and you are the 100th remaining, you might get a couple hundred gralats, if you're 10th remaining you might get an ec or something, and last remaining gets several ec.
It sounds like it could be considered an "epic event" due to how potentially large scale it can be and in depth.
better yet, make a score system with rewards according to how well you did:
You get more points based on what # remaining you are
You get points for killing other players(to discourage stagnant passive play where people just hide forever till like 10 are left)
maybe points for side objectives as well.
Also, make it a huge map so that it supports hundreds of players, I hate how hard it is to get into an event. Additionally, I prefer a score based reward system so that people who do well but do not win still get rewarded in some way, but those who win or do extremely well get the best rewards.
I personally don't mind the theme, but please keep it equalized where everyone has the same weapons(well besides picking a class)
also, make it ffa. IMO it works much better this way then a team based event.