Games that SHOULD have been a series, but weren't?

[sdp]

Blaster Master got a few sequels but none were successful so it never became a series. That is until recently, Blaster Master is actually better than ever. We got blaster Master zero like 3 years ago which seems like a remake but it's really a re-imagined game taking elements from all the previous sequels and having a hybrid of the Japanese and American stories of the games which are rather different. It got a sequel Zero 2 just recently which is also great and completely original and I'm sure s Zero 3 will happen. Franchise had never been more relevant then today.