Oh, I see. Yes, AAA video game titles have indeed become outrageously expensive to develop. As for the never being a great AAA title, it's unlikely, but not impossible for a couple reasons:
1. As this thread has suggested, this may not actually be an extraordinarily profitable era for the game, but the brand is very strong with near universal recognition, high goodwilll, and even the occasional free celebrity endorsement. Big publishers seek out such properties to license precisely because things with large built-in followings are the safest bets. They are not as safe as game sequels, which are most really big game investments these days as the big publishers become ever more risk averse, which is why I don't think this is a super likely possibility.
2. It's always possible that a smaller D&D video game could be a rampant success. It is then reasonably likely that someone will take the plunge on the more expensive sequel, which leads to the even more expensive sequel, which, providing there should be multiple successes. But this is unlikely because licensed properties more often than not produce lazy, underwhelming games, and I don't think much of what people enjoy about the tabletop game really translates to AAA video games as we know them today. And, of course, this scenario would hardly qualify as "anytime soon" as Untitled D&D Game 3, would be 10+ years of game development cycles down the road.
I'd definitely bet on your being correct that it won't happen.