For fun here are Comgnet preorders for Wii U games the day before release (yay for a db) w/ Splatoon's new #s:
From most preorders to leas (that charted):
[WiiU] Mario Kart 8 - 259pt - 5/2014
[WiiU] Super Smash Bros. Wii U - 251pt - 11/2014
[WiiU] New Super Mario Bros U - 200pt - 12/2012
[WIU] Splatoon - 5 days before release - 111pt - 5/2015
[WiiU] Monster Hunter 3 Ultimate. - 75pt - 12/2012
[WIU] Pikmin 3 - 74pt - 7/2013
[WiiU] Dragon Quest X v3 - 71pt - 4/2015
[WiiU] Xenoblade Chronicles X - 69pt - 4/2015
[WiiU] Super Mario 3D World - 66pt - 11/2013
[WiiU] Dragon Quest X v2 - 59pt - 12/2013
[WiiU] Nintendo Land - 54pt - 12/2012
[WiiU] Hyrule Warriors - 50pt - 8/2014
[WiiU] Fatal Frame V - 35pt - 9/2014
[WiiU] Donkey Kong Country: Tropical Freeze - 24pt - 2/2014
[WiiU] Wii Party U - 21pt - 10/2013
[WiiU] Bayonetta 2 - 20pt - 9/2014
[WiiU] Kirby: Rainbow Curse - 20pt - 1/2015
[WiiU] JUST DANCE Wii U - 16pt - 4/2014
[WiiU] Dragon Quest X v1 - 15pt - 3/2013
