at first i read this as meaning the opening ceremony - but, it's coinciding with the ceremony, so hopefully, not many will be watching anyway!
Shocking choice!
<<Tickets for the opening celebration concert go on sale on 4th May at 0900BST>>
Or alternatively, you can find them on ebay by 0930BST at 4 times the price.
Whether or not you see Duran as a good choice is likely to be governed entirely by whether you think they are a decent band or not -I personaly think they are great - and they are excellent live.
I think it's a shame they couldn't get someone a bit more relevant to the 21st century. The ones representing the other nations are ok, but I see DD as a bunch of 80s has-beens. Fair enough if they'd been active since that time, but they've done nothing of interest for 20 odd years.