What the court will do is order the charter amended. So far, so good. Perhaps it will repremand those officials whom Expo has alerted because they have not acted in accord with their duty. OK. In the absence of an actual, articulable wrong, however, that is as far as the matter will go. All laws voted on by the representatives of that presumptive state will stand as law because all interested parties acted under the presumption that the paperwork was in order, and that a state did exist, as intended.
My wife and I are still married even if the clerk forgot to sign the documentation. The suit, in that it will amend the charter, is a good thing; beyond that the whole matter gets silly, unless there was some damage done by a knowing bad guy using the flaw to unlawful advantage.
The sky is not falling.