Do you ever think the Year of Luigi was a pretty sub-par marketing tool to promote only one character? It appeared to be a good opportunity to elevate Daisy and Waluigi, two characters that appear to interact with Luigi quite a bit! But it didn't happen. We could've seen Daisy platforming with Luigi (I mean we got Daisy in Super Mario Run), Waluigi trying to sabotage the movement. Even Baby Luigi had an opportunity to get a bigger role in Yoshi's New Island, which came out around that time. But ultimately, I always thought it fizzled.