Too bad we don't get any sales updates from Sony anymore. I think Spiderman finishes around 25 - 30 Million units lifetime, God of War will finish around 20 - 25 Million units lifetime, Uncharted 4 is in the 18 - 22 Million units range, Horizon could finish around 15 - 20 Million units depending on the PC port, TLOU is over 20 Million units lifetime with TLOU: Part II on pace to 15+ Million units, GoT is a new IP that is on pace for 10 - 15 Million units, GT Sport is legging its way to over 10+ Million units sold, even Days Gone might be around 8 - 10 Million units with poor critical reception. I don't see why the majority of these franchises can't grow even more on the PS5 when you consider the strength of the PS Brand and its worldwide presence.
The most impressive thing about SIE first party sales is the amount of competition on the platform. GTA & RDR2 are massive IP's that rival Nintendo's highest selling IP's. Yearly franchises like Fifa & COD are selling 10 - 15 million units in a single year. Even mid tier franchises like Monster Hunter, Fallout 4 and Witcher 3 sell over 10 - 15 Million units lifetime. This isn't even considering other popular franchises like Crash, Final Fantasy, Batman: Arkham Knight, etc.