Bitcoin Gold, safe coin, bitcoinZ and others already announced that they will fork to stop the Z9 from mining their coin

https://twitter.com/SafeCoins/status/992171992915808258

https://twitter.com/bitcoingold/status/992085020142723073

https://twitter.com/BitcoinZTeam/status/992071199168630784

i am sure that bitcoin private and Zcash will follow this

lets see what will happen now