Are you even aware just how big of an operation they are now? They are spread out all over the place. Finallized the buyout of the last division of Eidos just last year I think, and now own the Tomb Raider franchise as well.
They have PLENTY of revenue streams coming in to help fund new projects. This is an ONGOING project that SHOULD be funding itself at this point.
2011 Annual reports
(just a little light reading for those who care to actual have some idea of what SE has going for it now--kinda puts it all in perspective when you see the bigger picture)