Apparently, according to the Dail Mail, Wigan are making a last ditch attempt to get Scotty on loan throwing in Marlon King to sweeten the deal

http://www.dailymail.co.uk/sport/football/article-1210364/Wigan-use-Marlon-King-pawn-Celtics-Scott-McDonald.html

Probably just a rumour, still stranger things have happened.....