I am not sure they are going to do any airdrop or not but their migration of matic token to POL is pretty exciting. What they are doing is adding all of their super net, zk chain and old pos network under one security layer where POL token holder can stake their token and secure all the network and earn fees from all the network by staking POL. That airdrop things can't be significant because a lot of matic in the circulation and it will be 1:1 token swap that means there won't be any new token that will be minted. What I think is they can distribute some kind of NFT to give especial access to their supporters.