It seems to me that if Bethesda (the publisher) wanted to play things smart, they'd like to get out Fallout 4 while the iron was still hot. With Bethesda the developer busy into mid-late October and Obsidian being ostensibly done with their current project (Dungeon Siege 3), is it conceivable that Bethesda could give Obsidian the Creation engine to get to work on the creative side of Fallout 4 right away whilst Bethesda Game Studios offered technical support when they were heading into the latter stages of development?
Of course, there's also the problem that it would give Obsidian the same problem they've always had: A buggy release on an engine their engineers aren't totally familiar with. But surely the fact that Fallout New Vegas sold well factors into Bethesda's outlook.
Of course, there's also the problem that it would give Obsidian the same problem they've always had: A buggy release on an engine their engineers aren't totally familiar with. But surely the fact that Fallout New Vegas sold well factors into Bethesda's outlook.