Which gaming series need to die or decline in the future?

[NintendoPie]

Marks said:

Yeah true! But I mean like recently made. In the past 10 years what have they made aside from the Wii series and Brain Age? Those 4 series you listed are all over 10 years old. 

I don't think they need to make something new constantly like you are implying. Those are enough, for now.