I wouldn't say they went back on anything. they just don't focus on numbering. the very first trailer straight up called it Metroid 5, even. "Metroid" is "Metroid", "Metroid Prime" is "Metroid Prime". if they though Dread to be anything separate, they would have designated as such
Yeah, it
was Metroid 5 and then they later decided better against that. Hence why it was there and then it was not. That's what I said.
Also Sakamoto explicitely said that Dread was the conclusion of the narrative arc, not the beginning of a new one.
After
Fusion he also said the game's conclusion
reverted Samus to her previous biology,* which I found a rather unfortunate and stultifying idea at the time, and which we now all know was a silly idea.
Anyhow, narratively
Fusion can work as an ending to an arc and
Dread as a beginning, though it kind of does push off to the end where the major changes could have started. So maybe it's more specifically liminal, but it finally acknowledges and does the thing that seems like it would be more the start of an arc.
But my main takeaway here is that a Metroid Classics Collection -- containing games 1-4, both originals and remakes where applicable -- which Nintendo simply titles
Metroid must be much more plausible and expected than I'd realized. Same with the Prime Trilogy simply titled
Metroid Prime, and the expectation that Nintendo will actually decide to call
Prime 4, um, mostly literally anything else -- which I was previously under the impression was considered a ludicrous idea.
So that's actually pretty rad.
... 'Cause the throughline here is essentially "Yeah, I think it would make sense to call the game something other than
Prime 4" --> "I think they should just call it Metroid" --> "Nah, 'cause that's what they're calling this collection. And they're calling this other stuff like such and such."
So I'm mostly just glad to have all that confirmed now.
*it seems a lot more difficult to find this Q&A than it used to be. I'll be waiting here for someone to come in with receipts that it was a mistranslation the whole time.