Heh. Sounds like pretty typical legal suit/counter-suit back-and-forth mumbo-jumbo. :shrug:
Although in my personal opinion, creating a package and calling it the "Fallout Trilogy", when it does not include Fallout
3... certainly appeared to be trying to "trade upon the look and feel" of the Fallout games developed by Bethesda.
But again, that is a personal opinion, and all the legal gobbledy-gook that one can dig up can be interpreted to favor one side or another, depending on your leanings.