After missing it when it came out, recently I (finally) got around to beating Metroid Fusion. I enjoyed it so much, I wanted to buy a copy for a friend of mine who
also loves Super Metroid and
also missed out on Fusion. I did a quick Google search for it, and on the Wiki page there is a really ugly GB Color looking screen, apparently taken during development. Looks different enough.

Then I found game stop's page for it,
HERE, and after flipping through the screens I noticed several differences from the final game. The map looks slightly odd. And what's that little circle radar thing about? Or that big block Samus is shooting at? And life bars...in Metroid?!
I don't remember this enemy being in the game
at all:

Anyway, I enjoyed the hell out of Fusion and recommend it to anyone who enjoyed Super Metroid. I found these seemingly pre-release/in development screens pretty interesting and thought I would share!