The keyword here is "if". This Bloomberg article suggests that no decision has been announced:
While TAP’S routes to Brazil might be especially attractive should Lan Airlines SA of Chile quit IAG’s Oneworld alliance after merging with Sao Paulo-based Tam SA, a member of the rival Star group, Walsh’s acquisition of U.K.-based BMI from Deutsche Lufthansa AG (LHA) means he now has the slots needed to add flights to growth markets direct from his company’s London Heathrow hub
http://www.bloomberg.com/news/2012-0...ap-appeal.html