My gut feeling is that Discovery (and "Calypso") will be retconned out of existence if it comes down to it for any future installment if this ending gets in the way.
That any future post-Kurtzman regime that might want to go in a different direction will "reinterpret" the material in the same way that Goldsman and company have done to the original IP.
No need to. They have essentially buried all of Discovery behind the super super secret "red directive". So as far as the regular Trek universe is concerned, all the events in Discovery never happened.