I would hope not. How can one's demand for information supersede another persons right to privacy in their communications?

So will this come down to any email which passes through an officially recognized organization, be it government or corporation or educational, as open to inspection and possible litigation? Talk about an Orwellian nightmare

You have it backwards. If the government/public corporations keep everything secret, that's the Orwellian nightmare.

The person you are suggesting has the right to privacy is acting in an official capacity, paid for by public money. These are not personal emails.

Just that fact that one person is bringing a litigation, is not a valid reason to mark everything top secret.

If you make everything in the machinations of government secret, then these things (and much worse) will still happen, but there will be no transparency or recourse. That is the worst possible outcome.