The thing Barca have to be concerned about is finding several otherwise second-choice or reserve team defenders who actually have half a chance of stopping Ronaldo/Rooney/Berbatov/Tevez.
Barca will always be a threat to any team going forwards but if Ferguson gets the strike partnership right in a week or so's time, I don't think the Catalans will be able to cope.
I say 3-0 to United with Rooney and Tevez sharing the goals amongst themselves. I hope that's the case anyway.
