Update: Thread's title has been changed to reflect all possible first party titles instead of the original 3.
Best selling instalment: Red/Green/Blue at 32m
Imo: Would be a mountain of a task to pull off but with the way the Switch is performing and the upcoming title essentially being the first mainline instalment ever made at a console level it's just as much of a possibility as it is difficult to achieve after all SMO is essentially a return of the SM64 approach many have wanted a return of and it moved 9m in 2 months, my current bold prediction for the game is that it will outsell Gold/Silver though so my personal verdict is that the series has seen an uphill climb in recent years and even delivering a competent instalment on the Switch could see it possibly happen but some other factors have to align, the game will be a monster but how much of a monster remains up in the air.
Best selling instalment: Wild World at 12m
Imo: I'm going to say yes on this one AC averages 10m and even the last instalment on 3DS may eventually pass WW as it stands now (NL has sold 11.5m), I can see the NS gaming hitting the standard 10m no problem and eventually outselling WW or NL if the latter becomes the best selling overtime with the sales obtain through legs.
Metroid Prime 4
Best selling instalment: Prime at 2.8m
Imo: The trickiest one to predict as this one comes down to how much exposure it's given and the approach taken, the original Prime itself had a luck of the draw as it got exposure albeit through controversy but at the time people didn't know what type of game it was and many bought it thinking it was going to be a Halo type shooter, this was the era before the likes of Youtube and social media where you can look up gameplay plus many forums and such yourself all people had back then were screens in a magazine.
Prime 4 could beat out the original though given Switch's performance, it's pretty much confirmed it's co-developed by Namco and a new internal team consisting of the people who were behind the cancelled Star Wars 1313 so the approach of the game may vary compared to the Turok inspired template Retro (who themselves were the former Turok team) brought us. I'll go for yes here as if Xenoblade 2 can break its own barrier then Metroid can as well.
Legend of Zelda: Breath of the Wild - 10.28m (Switch version only, total with Wii U version is around 12m)
Super Mario Odyssey - 12.17m
Xenoblade Chronicles 2 - 1.53m
Splatoon 2 - 7.47mLast edited by Wyrdness - on 15 November 2018