I don't want to project far, meanwhile think Nole is in great position to complete Nole's Slam next June. It is unprecedented chance, better than ever. Fed had peak Rafa in RG, who can stop Nole in 2016 AO and RG? Even IF (big if) Rafa comes back in form, it is still 50-50. Though it was not final this year, beating Rafa in straight in RG boosted Nole's confidence tremendously.
Nole can win AO with tough draw, evidenced by 2012 and 2015. Strangely I think RG should be his 2nd best major, in the context of Rafa's decline. Tough draw plus weather interruption shouldn't be repeated next year. Interestingly, he was fully compensated in both Wimbledon and USO with walk-over draw. Even weather helped him in USO final. After bagging Wimbledon and USO, he doesn't need stars aligned to win AO and RG.
And sometime next year he might surpass Rafa to be NO. 1 in Masters titles.