Nintendo does it the right way. I'm not at all afraid to say I want more Mario, Samus, Fox McCloud, Fire Emblem avatars and the like.

But they don't simply do roster updates, they bring those characters and worlds into new experiences, and they're willing to sit on good games rather than push out yearly new releases with almost nothing different compared to the previous iteration.

And the stability these franchises gives them, allows them to continue to make new IPs that may themselves grow into future tentpoles. So it's not just that they squander those successes, they are often trying to innovate into new things.