It's widely rumoured here that there will be at least two shows in Dublin on that weekend. If you remember that he sold out five shows in Ireland in 2013 (I don't know what the total attendance would have been, but probably c.200,000), then two shows in an 80,000 capacity venue wouldn't be outlandish.
I'd rather see this show in an arena. He's going to have to work his socks off to make The River work in a stadium setting, where at least 50% of the audience will be casual listeners hoping to hear Born in the USA ten times. It will be interesting to see the results.
If this were an ordinary tour I'd have no hesitation going to two nights, but I'm on the fence about going to more than one for a show where at least 22 of the songs will be repeated. How have you guys in the US found multiple shows so far?