Street Fighter VI on Switch 2 will happen. The lead designer of the game says he wants it on Switch and they are free from Sony exclusivity deals (probably the only reason SFV isn't on Switch 1).
There's really not actually that many big ticket 3rd party IP that are not on Nintendo platforms. The main ones are
Call of Duty (which is confirmed for the Switch in the future)
Grand Theft Auto
Madden NFL
Mainline Final Fantasy games (+7 remakes)
Mainline Resident Evil console games (well they are on Switch but via streaming)
COD, Street Fighter, Madden NFL, and mainline Final Fantasy and Resident Evil are gonna happen on Switch 2 I think.
Grand Theft Auto VI is the big question mark, but the Switch is the first Nintendo console to get a GTA game since DS and they put Red Dead on the Switch too, it seems like maybe relations are warming there but who knows.
It's not like Nintendo must have GTA. It would be a nice to have, but it's not the end of the world.
