It doesn't seem like IOI reunion will ever happen. And frankly there isn't even an interest among public for anything like that. So all IOI songs are in limbo.
Though, we know that a recorded version of Very Very Very by Twice actually exists as it was supposed to be a Twice song at first and JYP likely holds the copyrights as the composer. And it is a great song, I'd love it as part of tour setlist. So sounds like a great idea to me? 
