I think that everything you mention makes it easier. All the musicians have to do is learn the song and turn up and play it. They don't have to worry about bringing a PA and getting a decent FOH sound, they don't have to worry about promoting the event and/or selling tickets, and they will have nothing to do with setting up and operating the TV cameras.
As for the song itself, we're hardly talking Stanley Clarke levels of virtuosity, any half decent bass/guitar/keys/drums player should be able to nail it.