It may not be helpful in terms of the definition of blockbuster but my 2
cents worth would be to suggest that the intent of the exhibition might be
as important as the size or scope. Blockbusters usually have the intent of
"attracting very large numbers of paying [??] visitors" and thus have as a
result more than the usual amount of marketing push etc
Peter Millward
Manager Education & Visitor Services
Melbourne Museum
9651 8162