As long as the budgets aren't cut, it definitely won't be lightly themed. Current plans are VERY thematically robust.
Wasn't that supposed to be the case for Pantheon?
Granted, the pandemic may have had a lot to do with that vs. now, but with as much focus on ROI as there is these days I wouldn't be too surprised if someone in accounting made a good fiscal case to scale back all but the core attraction itself... Again.
However, as you've suggested, perhaps love-bombing their various communications channels with how much Nessie's new thematic elements make it a better ride alongside actually riding it regularly (and getting more people to experience it as well), they'll have more than just basic ROI calculations to consider.