I wonder if referencing the -D being recovered and being in the Museum is foreshadowing?
Since they have 'canonised' designs from Online I would love them to show us the Odyssey-class E-F.
What did happen to the -E though? Apart from the 3 movies, 'The Star Gazer' was the first time a Sovereign class had canonically been seen on screen. (not counting video games)
I am aware though that since SNW is in production they may not want to focus too much on the Enterprise? Akiva Goldsman said they brought in the new Stargazer as a ref to Picard's history because it's "not the Enterprise"
An yes, just because we have certain cast members announced doesn't ment that others aren't being saved for later on i.e. Wil Wheaton. Could a vengeful Sela be the big bad?