bansama: It's not that simple. Bethesda by all indications bought the Fallout IP completely and then sold the rights back to Interpay for them to make an MMO, which they had to then start production on within a certain time period. That period is now up, and Interplay seem no nearer to creating the MMO than they were 2 years ago. Ultimately, if anything, Interplay have failed to keep their side of the agreement and the rights should simply revert back to bethesda.
But like all things of this nature, I doubt we're getting all the details.
All I know is that Bethesda suing Interplay is basically trying to get blood from a stone. Interplay has no money whatssoever.....