Barcelona are favourites, of that there is no doubt.
However, there are few teams anywhere with the mentality of Manchester United. Never, ever, ever, ever rule them out. So I'm not sure.
Don't forget Barca lost the Copa del Rey final to Real Madrid, although it could be argued it was less important to them than Madrid.
So, on reflection, not sure. Man United won't make the same mistakes as 2009, though!