If they are gonna put all their teams to work in the same console instead of 2, as it seems they are gonna do, they can easily produce enough content to make the console attractive with the first party line up alone, once the console grows in sales third parties will want a piece of the cake.
Anyway, if the console is at least close to XBO, that would mean it can still get all the third party games, since third parties are not gonna be focused on Scorpio and Neo to not alienate the huge userbase with the standar models (at least that's what they say), so porting the game to a third console with such specs is not a big deal.