BOTW will definitely be the best selling Zelda game and Odyssey the best selling Mario game.
I'm not sure if Mario Kart 8 Deluxe will get past Mario Kart 7 but it will beat every other one (Except Mario Kart Wii of course but that's an unfair comparison since it was bundled with Consoles)
Nice to see Xenoblade Chronicles 2 having already sold more than the other games in the series, hopefully it sells even more. I just started playing it and i love it so far (My first Xenoblade game actually). Happy to see Nintendo's IPs doing well :).