I meant Breath of the Wild 2 actually, but it was a joke regardless.
Although ... At the same time ... You know that the game was probably not being worked on during that entire time, right? Like, in a similar way to where we can discount Metroid Prime 4 because it had to restart development midway through the original title, I think there's some leeway for The Last Guardian which was probably on hiatus for a good 2 years at least (in total, not saying those were 2 years in a row they took off), it wasn't even finished on PS3 as well so imagine how much work it took remaking parts of a PS3 game's code for the PS4.
Also I don't know ... I think Bayonetta 3 will come out this year (or at least hope so), and Metroid Prime 4 will probably be late 2022-2023 at the earliest. For Metroid Prime 4, that's 5.5-6.5 years after it's announcement. Doesn't matter that development restarted, it was announced in 2017, and your criteria was announcements. I'd say that's pretty close to TLG, to be honest.
If it comes out in mid 2024 or 2025 and if there is evidence that TLG did restart development for a year or two, then yeah they would be in the same category of slowness. But if they literally developed it for that long with no lengthy hiatus, or if MP4 comes out in 2021-2023 (which I think far more likely), then it absolutely is slower by a long shot than the three Nintendo games you mentioned.
Bayo 3 was practically a 2018 announcement (it was December 2017) so it's been just 3 years since it was announced and I'm fairly confident it is coming Fall this year (would be a perfect Halloween game for Nintendo).
I strongly suspect either BOTW 2 or MP4 will be their big holiday title, and the other one will be their big Spring title (which Animal Crossing filled this year). I wouldn't be surprised at all if MP4 comes out this holiday season (2021) and Botw 2 comes out on Botw 1/Switch birthday. If that is the case, then MP4 will only have had 4-5 years of development post announcement (and Retro only really having done like 3 years of development since it started from scratch). If BOTW 2 comes out either this holiday or next Spring it will have been less than 2 years since it was announced before coming out.