If they're not going to finish the games, why not just "open up" the code of the game and let the community hack away at it?
I'm still pretty impressed with the Pinside guy who hacked the ROM binaries and was able to allow successful sprite/graphic/sound modifications.
How much harder would it be to hack the rule set?
ps. I think it was kind of unfair to 'downvote' the OP. He's just proposing a 'What If' that I haven't seen previously discussed.