It's a good time to be a Metroid fan recently. While we still don't have much information on Metroid Prime 4, last October finally saw a new 2D game with Metroid Dread. Now, we've learned that back in 2002, we could've had Super Metroid included in Metroid Prime, but Nintendo blocked it.
Speaking with Kiwi Talkz, Metroid Prime developer David Kirsch confirmed this is true, revealing that he got Super Metroid loaded into Prime. However, Retro Studios' use of an unofficial third-party emulator caused its removal, but Kirsch's efforts weren't wasted.
Metroid Prime Team Were Blocked From Adding Super Metroid as a Bonus
Inspired by these efforts, Nintendo then approved letting Retro make the original NES Metroid unlockable. That's available by beating Metroid Fusion on Game Boy Advance, then linking your GBA to your GameCube with both games loaded up.
You can find the full video above, where Kirsch also revealed Shigeru Miyamoto helped Retro adjust Metroid Prime's camera to better fit Samus' height. We'll keep you informed as we learn more Nintendo and Metroid news.