Cole "Money" plays with money, Tevez plays with HEART, Can money overcome heart? XD
Ballack should be versus Carrick, and Carrick can silence Ballack.
If defending very well at the back, Drogba will be reduced to a "mild elephant" XD
Don't have to worry about Ronaldo, if he can't score, Man Utd still have Rooney, Tevez, Heagreaves, Giggs, Scholes, Nani, Park, Carrick, Anderson...on and on, who can score, not to mention Ronaldo can open up and create opportunities for his teammates to score.
Verdict: Like Wes Brown said, it all goes down to excellent defending, ie, back 4+1 and the midfield. Then it takes someone excellent up front to finish the job. Who will be that excellent one? We will find out soon.