It's funny how back in the day you could just get away with releasing a mainline sequel to a home console game on a handheld.
No one would question you.
"Isn't this gonna severely limit the scope of our game?"
"Don't you think that mechanically this might end up far worse than its predecessor?"
"Can we even do a map as big as the first game, let alone bigger?"
"Do you think people will get tired of the same black and white temple environment for the entire runtime?"
All of these questions and more are ones Metroid II is willing to answer!