Hot on the heels of their very successful remake of Metroid: Samus Returns, it appears that MercurySteam may not be done.
While it's pure speculation for now, there's some pretty solid evidence within Metroid: Samus Returns that a Metroid Fusion remake will be happening sooner rather than later.
Spoiler for the post-credits scene
Upon completing the main story and watching the credits, you are treated to an ominous scene: one of Metroid 2's familiar Hornoads hops innocently behind a rock, where you get a very quick glimpse of a yellow... something... moving in. The Hornoad subsequently emerges looking transformed and a good deal scarier, which may be a nod to the opening cutscene in Metroid Fusion.
Metroid Fusion fans will recognize the blob as potentially being the X Parasite: an extremely hostile organism native to SR388. Their spread in the wake of Samus' destruction of the Metroid species is what triggers the events of Metroid Fusion, making it a sequel of sorts to Metroid II.
Just a nod to Hard Mode and Fusion Mode? Maybe. But you'll recall that MercurySteam also originally pitched Nintendo on a Metroid Fusion remake before ultimately being assigned to Metroid: Samus Returns.
From Game Informer:
With all of Nintendo’s internal studios busy with other projects, Sakamoto needed to ﬁnd a development team that could tackle his dream project. Fortunately, one studio had been pounding on Nintendo’s door with a Metroid pitch. After ﬁnishing work on a few Castlevania projects for Konami, the Madrid-based developer MercurySteam pitched Nintendo on the idea of remaking Metroid Fusion – the 2002 GBA title where Samus got infected with a parasitic organism. Sakamoto was impressed with the studio pitch and their love for Metroid. He told them no, they couldn’t remake Metroid Fusion… but he did need their help on another remake.
Sure seems like a teaser to me.
You can decide yourself in Metroid: Samus Returns, which is out today. I strongly recommend it.