As for third party games that could have possibly sold 1M from April-December this year I'd think these are the possibilities:
New releases:
Mortal Kombat 11
Fifa 20
Crash Team Racing Nitro-Fueled
Just Dance 2020
Mario & Sonic at the Olympics
Witcher 3
Old releases:
Minecraft
Hollow Knight
Mario + Rabbids Battle Kingdom
Specific case:
Dragon Quest XIS - While I do think this has sold 1M+ across Japan and rotw, I could imagine Nintendo considering this as 2 differences releases because of different publishers. Octopath Traveler for instance, the numbers we received by Nintendo for that game did not includes sales for the Japanese release. So really, Nintendo has weird ways..
My guesses:
Minecraft
Hollow Knight
Witcher 3
Crash Team Racing
Just Dance
If DQXIS counts, I'd scratch Hollow Knight.







