There was no last-minute miracle for Utopia. I hear HBO and David Fincher were not able to reach a compromise on the size of the budget for the conspiracy thriller series. As a result, the cast of the project had been officially released by HBO. While never confirmed, I hear it included Rooney Mara, Colm Feore,Eric McCormack, Dallas Roberts and Jason Ritter. I hear they had been rehearsing for up to a month while budget negotiations were unraveling.
Source and more: Deadline