Absolutely nothing behind it, but surely they'll just do the smaller Hot Fuss shows in that week gap between the arena ones? Sure it'll make people angry because they'd rather just see that, but people will be keen enough to pay. Seeing as half the band just like cashing the cheque (fair play) surely they won't be going back and forth.
Wonder if like those TRNSMT and Garage ones after Wembley they'll just be last minute announcements, rather than an anniversary tour.