the 2d one looks like rayman. I always tough that metroid in 2D should have setting similar to megaman games, but lesse colorfull. Stylized art don't really fit metroid, in my opinion.
"Hardware design isn’t about making the most powerful thing you can.
Today most hardware design is left to other companies, but when you make hardware without taking into account the needs of the eventual software developers, you end up with bloated hardware full of pointless excess. From the outset one must consider design from both a hardware and software perspective."
Gunpei Yoko