According to Vgchartz Wii Sports has sold 82.65 million, Now since nearly all of these sales were because it was a pack-in title, the same must apply to the ps5 pack-in title Astro's Playground.

So will it outsell Wii Sports?

I say probably it has a 50 / 50 chance.

As the PS5 may bomb or they stop including it later on

Is Astro's Playground even sold separately?

Well, to be fair, Wii Sports was initially only sold in Japan separately and only late in Wiis life became a separate thing. Problem for Astro's playground is, that it is digitally preinstalled, not a physical media.

If it's not sold separately, then I don't think it can be counted. Otherwise the best selling videogame of all time would be Solitaire or Snake.

This is like counting Snail Maze as part of a SEGA Master System collection.

If it's digital only and already downloaded, then to me it's more an app than a game.

Yes. It will outsell Face Raiders too.

The difference being Wii Sports was a title that actually drew people to buying a Wii (system seller/killer app). I haven't heard anyone say that Astro's Playroom is the reason they are getting a PS5.

PictoChat greatest selling game of all time confirmed.

Astro's Playroom is the reason I am getting a PS5.