The Gunners will have to see off competition from their Premier League rivals and one of the Champions League finalists if they hope to complete a deal.
The West Bromwich Albion striker, linked with West Ham United, Everton, Crystal Palace and Watford, is reportedly heading to Stoke City.
The 29-year-old Bosnia and Herzegovina international spent six formative years living in Canada.
David Moyes seems to rate the Arsenal and Germany international star Mesut Ozil highly.
Stillitano says Rangers and Celtic need to recognise their global appeal or else risk hampering further growth.
Leeds United apparently wanted to sign Marcus Maddison from Peterborough United last January.
Manchester United will reportedly target Julian Draxler if they can't land Henrikh Mkhitaryan.
A Gareth McAuley own goal saw Michael O'Neill's men fall to a narrow 1-0 defeat in Saturday's Euro 2016 last-16 tie in Paris.
Crystal Palace expect interest in star defender this summer.
Brendan Rodgers is reportedly keen to reunite with his former Liverpool defender Kolo Toure.