The game probably wouldn't even fit on Switch cartridge. They released Ghosts on the Wii U, so it's possible, but very unlikely. I'd rather see Overwatch on Switch than new COD.
Edit:
Apparently thers's rumour circulating that COD WW2 is being ported by Activision's 3rd party dev (that's where the leak's from) and it will be revealed later on, around E3 time.