There's an old and very common saying in Hollywood that the biggest money-losing film ever was the Sound of Music. The joke here is that though the film did rather well...
Upon its initial release, The Sound of Music briefly displaced Gone with the Wind as the highest-grossing film of all-time; taking re-releases into account, it ultimately grossed $286 million internationally. Adjusted to contemporary prices it is the third highest-grossing film of all-time at the North American box office and the fifth highest-grossing film worldwide.
... The films it inspired lost a lot of money. That's a bit of an oversimplification. Music was just the last of a string of hit musicals in the early Sixties ( West Side Story, The Music Man, My Fair Lady, Mary Poppins) but it was the biggest and it suggested an upward trend and, to the extent that it was responsible for what followed, it might well justify that money-losing title.
The commercially and/or critically unsuccessful films included Camelot, Finian's Rainbow, Hello Dolly!, Sweet Charity, Doctor Dolittle, Star!, Darling Lili, Paint Your Wagon, Song of Norway, On a Clear Day You Can See Forever, Man of La Mancha, Lost Horizon and Mame. Collectively and individually these failures crippled several of the major studios.
I don't want to push the analogy with comic-book movies but there are similarities, particularly regarding the budgets and the stories executives told themselves to justify them.
And I'm pretty sure if Motley Fool had been around in, say, 1967, these upcoming movies would have generated lots of optimistic exclamation points.