Nintendo UK has published a FAQ section on their dedicated webpage for the newly announced Nintendo Switch (OLED model) and it confirms what most of us thought, that the Joy-Cons included with the new model are no different from the current Joy-Cons found on the current Nintendo Switch system and Switch Lite system. The Dock is the same too and can be used on both systems, although a system update may be required. The Nintendo Switch (OLED model) launches on 8th October which is the same date as Metroid Dread.
Can I use the Joy-Con controllers I currently have with Nintendo Switch (OLED model)?
Yes. The Joy-Con controllers included with Nintendo Switch (OLED model) are the same as the controllers currently available.