Let's say you've purchased an annual release and you didn't enjoy it as much as its older companions. Then a few months later, the next game is announced.
You're unsure on if you should buy it, due to the problems that you faced with the previous installment -- lackluster story, broken mechanics, game breaking glitches etc.
You'll most likely not going purchase the next game, due to fear of being disappointed yet again. And that's perfectly understandable, due to how underwhelming some annual franchise releases can be.
Pretty much every annual franchise began as a game that struck gold and got popular, but year after year of releases can be too much of a good thing.