"We are confident that over the coming years we'll deliver a side that gives our great supporters what they deserve, " wrote Sullivan in his programmenotes.
Wenger used his programmenotes to launch an impassioned defence of Theo Walcott following criticism of his disappointing performance for England against Egypt - but decided to start with him on the bench.
Cesc Fabregas is likely to recover from a hamstring injury in time to start at the Nou Camp but in his programmenotes the Gunners captain urged Arsenal to focus solely on Sunderland with the title race "in our hands now".
Writing in Sunday's programmenotes, Sullivan announced that the club will look to make "five or six" signings over the summer in a bid to avoid a repeat of this season, which has seen the east Londoners finish only five points above the relegation zone.
The incident came after Wenger used his programmenotes to call for talks between managers and referees to clarify rules on tackling after a spate of unsavoury incidents this term - most notably tackles by Manchester City midfielder Nigel de Jong and Wolves defender Karl Henry.
No country allowed evidence from spies to be heard in public, he told Radio 4's Today programme, as this would lead to "terrorists sitting in the public gallery and taking notes".