Would games that ride on to their ancestor's titles count?
It's reasonable to not expect final-for-real-fantasy <N> to not be the same as final-for-real-fantasy <N-1>. But since it is marketed this way, is it the norm to expect great things?
Games that don't explicitly use numbers can be considered in this scheme too. Example: A game called "Barcraft: Burps and Germans: Oktoberfest" would count.