Which is why I don't think they'll be a huge number of 'new' season ticket holders.
A large portion of the 32k (ish) we have retain them because it's a good, unobstructed seat that they can't risk giving up. Every single seat at the new ground has a clear view of the entire pitch so it's less of a critical. Issue.
I'd imagine season tickets will remain at around 32/33k, with possibly 2 to 3k of current ticket holders opting for some level of premium seating.
I fully expect the club will bring in new membership tiers for non-season ticket holders to have priority access to vacant seats, and top games (Derby, Utd, City etc) needing home credits to secure a ticket. (I remember Derby tickets where always a stub of the home game two games before.)
They'd also be mad not to sell outrageous weekend packages for overseas fans. (Airport transfer, Hotel, Stadium Tour) filling out a match day weekend. Obviously, for those to be marketable we'd need to be pretty good at footy.
Baby steps.