so hes gonna have to work to pass edberg
Not too much. It's unlikely Federer will win all those events and besides, Nadal is likely to collect decent points in all of them too. I think it is almost assured that Nadal will stay #1 until the beginning of Monte Carlo at least which is about 33 weeks away. This will put him at 91 weeks and 8th on the list.
Even if Nadal loses in the first match of every event he plays between now and Monte Carlo, he will still have 7540 points come April. At the moment #2 has only 7215 points hence it is looking very good for Nadal.