[The non-linear action platformer layout of Super Metroid, was a direct copy of the original Metroid. Castlevania 2 followed the same layout as Metroid. In turn, SOTN was more similar to Castlevania 2 than any other Castlevania, making it "owe its existence" whatever that means, to Metroid.
So no, none of the SNES remakes were original, nor did they start anything new that hadnt been explored already in their NES predecessors.
Saying that the style of a game is based on Super Metroid and not Metroid is like saying a puzzle game with falling bricks was based on Tetris 2 and not Tetris.
Gah. How do I get into these arguements?
What SNES remakes are you talking about?
(forgive this rant if I misunderstood what you were talking about)
There is exactly 1 Castlevania game on the SNES (not including the botched port of Dracula X) and it is Castlevania 4. The gameplay format of Castlevania 4 is EXACTLY the same as the original Castlevania. Completely linear. Not a single branching path.
I disagree that Castlevania 2 followed the same format as Metroid. Going from Castlevania 1 to Castlevania 2, the series took more inspiration from adventure games like Zelda than it did an action game like Metroid. It had towns (safe zones), day/night light cycles, dungeons and dungeon bosses, currency and stores, and overworld hubs.
That it was the first non-linear Castlevania game doesn't change the fact that it was Super Metroid that shaped the Castlevania games of today. After Castlevania 2, the Castlevania games actually got MORE linear.
Maybe we're having a difference of semantics here, but when I say say SotN is a Super Metroid "clone", I mean that it's similiarities go above and beyond simple inspirations (as you might arguably compare Metroid and Castlevania). Many things are straight up lifted from Super Metroid and used in SotN. Just hit the select button on both games to bring up the map and you wouldn't be able to tell the two apart. The pacing and exploration gameplay of the two games are EXACTLY the same.
I quote wikipedia
"The nonlinearity of the game [SotN] proved to be one of its most acclaimed aspects. The gaming press often draws comparisons between the gameplay of Symphony of the Night (and its 2-D successors) with the popular Super Metroid,[9] which led to the coinage of the terms "Castleroid"and "Metroidvania" (portmanteaux of Castlevania and Metroid).[10]"
When I say that SotN "owes its existance" to Super Metroid, I mean it. If Super Metroid hadn't been released, SotN would have been completely different. It would have been more of a direct gameplay sequel to it's predecessor, Dracula X:Rondo of Blood.
edit:
Since people are questioning whether I was around for the NES... I guess I'd like to add that I have beaten every Castlevania game released in the US except for the DS games.