Not sure if anyone else has ever thought this... But in some respects, I think there is an argument that Bethesda in some ways is the "current" Interplay in that they now hold the position in the market that Interplay once held. They're not a "First Party" developer ala Microsoft, Sony, Et al. They're not a "Top Tier Platform Neutral" developer like EA, Take2 and Activision/Bilizzard, but they do make a number of, well performing top tier games and publish a good deal more. They've even made the odd star trek game (not to mention Fallout of course)
No matter how you stretch this, it's a pretty unethical move by Altman's lawyers. Todd is probably pretty pissed that people playing the old 'uns see exactly how sub-par FO3 is.
How do you figure its unethical? Bethesda have done nothing but enforce a contract Interplay entered into. If Interplay didn't like the terms, they didn't have to sign.
(lets also not forget the flaws in Fallout 2- the crash to desktop bugs, the areas being cut to meet deadline, the left over quest clues with no quest... The originals were no pieces of perfection themselves)
In any case, the terms that are allegedly being breached seem fair enough to me, they aren't "Gotchya" clauses. Interplay (allegedly) agreed to have a certain amount of cash on hand to develop a MMO. They also (Allegedly) agreed to let the license owner of the fallout brand OK any material that used the brand. Brands are very valuable, and it would be negelegent of Bethesda if they didn't enforce their rights, likewise enforcing the contract to have a certain amount of cash on hand to develop the MMO also makes sense - You can't make a blockbuster game with pocket lint, much less an MMO. Enforcing this stops the potential weakening of the fallout brand by an inferior cut price rush job being developed due to lack of funds, and allows them to ensure that a game of a quality acceptable to them is made.