Impossible to predict. The top four are about as evenly matched as I can remember them ever being.
Huge question marks about how we'll cope without Ronaldo, Chelsea haven't really strengthened (and they're not getting any younger that team), can't see Liverpool having as much joy against the other three as they did last year, and Arsenal could possibly find the form of the 07/08 season again if they stay clear of injuries (though I believe the loss of Adebayor is underrated).
Huge question marks about how we'll cope without Ronaldo, Chelsea haven't really strengthened (and they're not getting any younger that team), can't see Liverpool having as much joy against the other three as they did last year, and Arsenal could possibly find the form of the 07/08 season again if they stay clear of injuries (though I believe the loss of Adebayor is underrated).