United go into the final day a point behind Chelsea, relying on Wigan to produce a shock at Stamford Bridge if they are to have any hope of winning a fourth consecutive title.
Many feel the failure to make high-profile signings following the departure of Cristiano Ronaldo and Carlos Tevez has cost United this season, and Rooney is hoping Ferguson can bring in another top-quality striker for next year.
"If we can bring in two big-name players in it would give us a good chance of getting the league back if Chelsea do win it," he told the People. "If you look at the team in 1999 that won the treble, we had four forwards, all capable of scoring goals.
Alongside Didier Drogba, Rooney is currently joint top of the Premier League goal-scoring charts with 26 goals, and he knows that - even if he does get more support in attack next year - he will be expected to deliver a similar total again.
"I've been disappointed with the last month of the season with injuries but overall I am more than happy with the number of goals I have scored this season," he said. "The manager told me he would be playing me more up front and I knew that with Ronaldo and Tevez leaving I would have to score more goals.
"To score so many this time was fantastic - but it's still not my best season. I once scored 76 in a season when I was 11. But it's my best as a professional and I know the expectation will be there for me to do it again next season."
Meanwhile, Rooney has played down any suggestion he could leave Old Trafford this summer.
"I have two years left on my current contract so talks haven't started yet on a new one," he said, "but I am sure after the World Cup we will sit down and speak about a new deal."