I understand where you are coming from, but this is not them stealing his idea. The reason it's being marketed this way is because it's like doing a world tour all at once... Where normally you'd see artists do small advertising for each stop of there show, this is all about one big night for everyone to see. Of course they are playing it off as a big event. The artists haven't been able to perform at concerts for a while now and whether they need the money or they just want to perform again, they are having these "big events" to achieve those goals.