Weeeell...when we think about it really hard...then doesn't it boil down to the fact that every single game is practically the same as it's predacessors? Still the same objectives, still the same level design gimmicks bla bla bla. We all understand that for a game to be called a worthy succesor or sequal, it has to have that specific freshness around it. You know when you're playing a bad sequal if you're not tingling with the feeling of something new that revolves around it.
That's why i completely dismiss ckmlb with his antics about the mario64/smg,OoT/TP similarities. They're the same at the core? Sure they are! Just like the rest of the games in the repectful genre. But these games have enough differences in them when compared to each other, that people don't get the "i've seen this before" feeling a lot of times, if at all actually.
Oh yeah, ckmlb, did you play the new metroid?
Deep into the darkness pearing
Long i stood there
Wondering
Fearing
Doubting.
