He asked two things, one of which was:
"So I'm wondering how feasible it is to invest massive amounts of time in a game designed for the arcade card..."
Even if the entire world had an arcade card, I personally don't think it's suitable to waste that much time on it.
Given things that have been said in chat before, I can only assume an ACD game would involve an RPG larger than Mysterious Song from Rover, or some sort of multidisc or hybrid game.
Taking into account the problems with Mysterious Song, the length of time the project took, and the now current list of projects from Rover, I don't think it's a good idea to add another project that will undoubtedly take a great amount of time and effort that will ultimately just take away from the current projects that people are already interested in.
Maybe 5 years from now, if all the other stuff is out/almost out, I'd say go for it. but right now? Hell no. Monolith or GTFO.