Hell no. They need to make good games consistently. Metroid IMO is Nintendo's highest quality (per average) franchise. Seriously, the worst games (the pinball spin-off aside) in the series are the original, Metroid II, Metroid Hunters, and Other M. All of those are very good games.
Really, I think Metroid should stick with the staff that made Super Metroid/Metroid Fusion and Retro Studios. If Nintendo was smart, and they are, they should keep continuing to grow Retro Studios so they can make 2 games at once. Imagine them making Metroid and Zelda at the same time! o.O
@ClaudeLv250No, the reason people hate Other M (and Team Ninja) is because Team Ninja (like a fair share of Japan) is sexist, they wrote an awful script, and that game was nothing compared to the Metroid Prime trilogy that came before it. We've become accustomed to Metroid being held to a standard that few video game franchises could claim to ever being held to.