AM2R: metroid2remake.blogspot.co.uk (Only one that was completed).

MSR388 isn't really a remake, but heavily based off M2: https://www.youtube.com/watch?v=Ba6-DtjuZ8E&ab_channel=Romyggar

Metroid Origins: https://rpgmaker.net/forums/topics/909/ (This one had a really nice art style).

Metroid 2 Remixed: https://www.youtube.com/watch?v=Z6oZMKqdfZM&feature=youtu.be&ab_channel=Sephihatu

MTR: https://www.youtube.com/watch?v=R9e-cuflCYg

I think that's all.