Perhaps 5 red things = new modes (time attack, etc?) or maybe a bonus stage? I hope it ain't for a bonus stage, I hated how the Advance games did that.
I personally hope they unlock wisp spesific challenge stages.
For example, how about a level where its just a massive 'dig' area where you have to use the yellow wisps to dig from one wisp power up to the next with under ground obsticles and paths to make it a challenge.
Or
One where you use the Rocket wisp to try to do a kind of hit all 15 or so targets challenge that they have in the Smash bros games.
I just hope they have this kind of stuff so they use the wisps to full effect.
