Yes, you are able to get Etherzero (fork coin) by keeping ETH in MEW. In fact, there are several wallets including IMtoken, Ledger and Trezor that support this fork. Check the full list in Etherzero website.
https://etherzero.org/Are you guys sure that the hardfork will happen? The website seems pretty inactive to me. For example, where there should be a whitepaper it just says that it will be uploaded soon. If the fork were to happen that soon, I suppose there would be a whitepaper.