Yeah flp sharing is awesome. Sad I'm out for now.
I'd really like to see something lighthearted, like a vocal edition of DoD with the option of whistling, humming, beatboxing, freeeestylin', scatting, talking gibberish. Or opera if you insist, who cares. Mouth and throat based sounds.
Once people become comfortable with a format like that, you could do duet or ensemble editions where people draw numbers and come up with unlikely match ups.
But yeah, all in a fun spirit. Like a marriage of overclocked and overlooked acapella.