The rest, as they say is history -- Bethesda filed a termination letter for Interplay to stop working on the project last year, claiming that the developer had missed the aforementioned start date. Caen contends that claim, saying Bethesda was merely looking for a way to acquire the rights to a Fallout MMO without fronting the $50 million price tag, which is a large sum of cash.
[Source: Joystiq]