Since you're doing Wario Land 3, will you impliment the treasures and music boxes into the game with some kind of ability? I did have some thoughts of an Adventure Mode with a huge map that details the entire Music Box Kingdom. At the start of the adventure, only the North section is traversable. After collecting the 1st music box and taking it back to the shrine, the music stops for a minute while the music box's song echoes throughout the map. Then the West section opens. This would repeat until the 4th music box when a path connects the East and North sections. Then, when the 5th and final Music Box is found and taken back, after it's music plays:
I'm not afraid to admit this theme makes me break out in tearsThen...out of the volcano...RUDY!
He thows his fists at you, and tries to grab you, throwing you into the ground afterwards. Shoot at the fists to destroy it which spawns a HammerKnuckleWep, to use against him. Don't worry, his hand respawns later. Once he's done and over with, THE END!
Now, I know I pretty much either described or spoiled the entire game, but I'm saying that this would make for an excellent concept for an Adventure Mode.
Also, if you need textures, I'll help out.