With Ronaldo and Tevez gone Man.U have signed 3 players (Owen,Valencia,Obertan) however they cant compare them to Becks with him rejecting chelsea and tottenham and reportalbly saying he has his sights on United so will Fergie take the former Ac Milan and Real madrid player.
It all depends how we are doing in January when Beckham is likely to move. If we are doing well he might sign him to consolidate (a bit like the Larsson signing). If we are doing poor (3rd/4th or worse!) then people would demand a few big signings so couldn't see it happening.