The problem Dread does have is that no matter what it's still a 2d Metroidvania game. What's the highest selling title in that genre? It will always have a limited reach because of the type of game it is.
Still Dread has the potential to be the best selling game in that genre ever.
Limits were meant to be broken.
Twilight Princess was the best selling Zelda game and it didn't even reach 10 million. Breath of the Wild is on track for over 30 million.
Not a single Fire Emblem sold over 1 million before Awakening. Not Fates and Three Houses have each sold at least 3 million
Super Mario Odyssey has blown every other 3D Mario game out of the water and effectively raised the ceiling for ALL 3D platformers in the process.
Mario Kart 8 Deluxe is on pace for 50, possibly 60 million... When it wasn't that long ago where nobody thought a racing game would ever touch Mario Kart Wii's numbers again. Monster Hunter Rise is well on its way to being the best selling 3rd party game on any Nintendo platform.
To my knowledge, the best selling "Metroidvania" is Hollow Knight, which was at 2.8 million sales by February 2019. It's more than likely sold well beyond that since then. So the ceiling for "Metroidvania" is even higher than Metroid itself.
So, Dread could absolutely do the same thing as the other Nintendo games I've mentioned. The Switch does not give a shit genres or limits. It just sells. Along with everything on it. Dread has all it needs to break that glass ceiling wide open.
Hardware Comparison Threads:
PlayStation/Xbox/Switch Hardware Battle: 2021 Edition!
PlayStation 4/Xbox One/Nintendo Switch: 2019 vs. 2020
PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019
PlayStation 4/Xbox One/Nintendo Switch: 2017 vs. 2018
PlayStation 4: 2015 vs. 2016 vs. 2017