Before they can court martial the guy, they have to order him to deploy, and he has to refuse the order. If they instead withdraw the deployment order (no doubt following the Chief's order), then they can't court martial him. And it will get very interesting if he starts a trend.
Didn’t someone post in the last 48 hrs that Orly has others filing in Cook’s wake (no pun intended)?
No, but the Secretary of the Army can send him a letter saying his service is no longer needed by the Army Reserves, thanking him for his service, and wishing him well in his future outside of the military. Don't be surprised if that happens.