It will be interesting to see. It will likely be higher than the last time a similar itinerary was offered, but I think the lines are smart enough to know that they cannot raise the prices absurdly as there will come a point when no one will pay it and they'll be emptier.
It will also be interesting to see - even with the "pent-up demand" how many people actually do come back - either immediately, especially given that masks will likely be required, vaccines mandatory for all eligible, etc.; or waiting a bit until masks are not required and things are more "normal" (honestly I don't see the vaccine requirement going away, so anti-vaxxers are likely going to be out of luck) - and how many people, FCC or not, are just too scared to get on a cruise ship knowing what can happen now.