I would probably assume..
Mario Maker > Splatoon > Yoshi
Mario Maker will probably have tons of replay value; Making crazy levels and sharing them with your family members or the gaming community, people doing YouTube vids of the most rage-inducing levels, and so forth.
Splatoon seems like a game that focuses on the online multiplayer aspect, which the Wii U heavily needs. It'll probably boost more sales if the game has a Story Mode with a compelling story line, as well as allowing voice chat for multiplayer (please enable mute options so I don't have to hear little kid voices).
Yoshi's new game gives off a vibe that's gonna be another forgettable 2D platform game similar to DK Tropical Freeze, little to no replay value.







