The 3 Artists One Song track has been released, and it's glorious. I couldn't have asked for a better song. I got goosebumps listening to the track. Yuna and Idiotape composed a wonderfully unique song, combined with her voice and Flow's lyrics the track was exceptionally exciting. But don't let me just blabber on, have a listen for yourselves.
It would be amazing if they put something out together again, but I'm afraid that this is a once in a lifetime song, so I'm just going to take it, and enjoy it.