I don't think it would pass a vote due to the fact that you're going to have to split the rewards somehow... which means you either need to split existing modern/wild into thirds... or you need to split wild rewards for passive/active play. The question at that point becomes... why do we need passive play at all when an airdrop would suffice? Which also raises the other obvious logical fallacy here... we don't have a "human only" modern... which means we likely wouldn't have a "human only" wild. There just isn't enough match liquidity to support it.
I think a better approach would be this...
Anyways, that's how I would personally approach all of this, but yea, I'd suggest following azircon's advice to see if you can at least get the majority of top holders to accept or at least not block the idea before spending too much time on it.
RE: Tier Five Guild Brawls and Should We Add Human Only Wild?