Man people keep under estimating the zombie genre. But it keeps on selling and if it's marketed right it has its crowd regardless of meta score.
Dying light sold 5 million, so did Dead island. Dead rising 3 sold 2.1 million. All these games had an average Meta score at best. But they sell. They just have to be fun.
I know this is off topic, but I think Days Gone can be huge is its marketed right and gets an 80+ meta.