I think you're right. Both about games, and tv / movies. Look how it turned out for Ubisoft when they turned every game into Assassin's Creed / The Division. Ghost Recon: Breakpoint ironically being a break point that showed that this strategy leads to player exhaustion, burnout, and failure. Kevin Feige ironically said something like, "Chocolate ice cream is tasty, but if you only give people chocolate ice cream every day, they'll get sick of it and want something else. Which is why we have to keep mixing things up and giving people something new if we don't want them to get tired of it."

...and he didn't even take his own advice. Well, not in the long run anyways. And we see how it's slowly failing as of late.