One Direction would fill it for two weeks straight easy, during the summer holidays
Apparently they sold out the UK tour on the day they went on sale, with the O2 London selling in hours/midday. They are also selling out the US part where they are using NFL stadia to host there gigs. One direction did two dates at Wembley last year as well.
If Ed Sheeran can sell out 3 dates and Eminem 2 dates at Wembley stadium then I'd say it was easier than you may think.
Europe
- 24.09.15London, GB, O2 ArenaI'm goingSold out
- 25.09.15London, GB, O2 ArenaI'm goingSold out
- 26.09.15London, GB, O2 ArenaI'm goingSold out
- 28.09.15London, GB, O2 ArenaI'm goingSold out
- 29.09.15London, GB, O2 ArenaI'm goingSold out
- 30.09.15London, GB, O2 ArenaI'm goingSold out
- 03.10.15Manchester, GB, Manchester ArenaI'm goingSold out
- 04.10.15Manchester, GB, Manchester ArenaI'm goingSold out
- 07.10.15Glasgow, GB, SSE Hydro ArenaI'm goingSold out
- 08.10.15Glasgow, GB, SSE Hydro ArenaI'm goingSold out
- 10.10.15Birmingham, GB, Barclaycard ArenaI'm goingSold out
- 11.10.15Birmingham, GB, Barclaycard ArenaI'm goingSold out
- 12.10.15Birmingham, GB, Barclaycard ArenaI'm goingSold out
- 16.10.15Dublin, IE, 3ArenaI'm goingSold out
- 17.10.15Dublin, IE, 3ArenaI'm goingSold out
- 18.10.15Dublin, IE, 3ArenaI'm goingSold out
- 20.10.15Belfast, GB, Odyssey ArenaI'm goingSold out
- 21.10.15Belfast, GB, Odyssey ArenaI'm goingSold out
- 22.10.15Belfast, GB, Odyssey ArenaI'm goingSold out
- 25.10.15Newcastle, GB, Metro Radio ArenaI'm goingSold out
- 26.10.15Newcastle, GB, Metro Radio ArenaI'm goingSold out
- 27.10.15Newcastle, GB, Metro Radio ArenaI'm goingSold out
- 29.10.15Sheffield, GB, Motorpoint ArenaI'm goingSold out
- 30.10.15Sheffield, GB, Motorpoint ArenaI'm goingSold out
- 31.10.15Sheffield, GB, Motorpoint Arena
Don't forget there was also the rumour of AEG selling the O2 arena and searching for a larger venue in order to fight off what the Olympic stadium would rival.. numbers. Yes that AEG link just won't go away will it. AEG also own AEG Live, the world’s second-biggest live music and concert ticket company which no doubt will be an advantage should they be brought in.
http://aegworldwide.com/facilities/arenas/arenas