this need an hard fork then
that is an option, but let's not rush to conclusions.
I will sell off all but a token position of any CN coin I have mined that does not hard fork to protect itself against the Baikal Giant N. You basically have 2-3 weeks to get your shit together or you can experience what SIA just went through.
What if the baikal already has support for the new monero PoW? This is what I mean with "don't rush to conclusions". You risk double damage. Let's study the baikal and all the PoW options we have and decide carefully. A hard fork is not something to take lightly.