I somehow believe that this venue will be cancelled or changed by the high command.
I would think the fact that vindman went out of the chain of command to bring down the Commander in Chief would be a negative thing for him.
I think it's even more likely that the high command will leave the orders in place.
I would hope that this is BS. But if it is, then the rat-bastards who arranged this should be sent to sort paper clips in an old NORAD/North warning site in Canada
Since he has already been approved, he will likely be allowed to attend, but even he should understand that he can never be promoted to full Colonel or given a meaningful command. He drew negative attention to himself and thus became a liability for anyone who might have considered sponsoring his career. Retirement is his only viable path.