If Nadal wins RG next year, will he replace Bruguera? It's hard to judge since he has only played it twice, but won both times!
Yes, I guess he would.
The criteria I used were: slams won (of course), slam finals, great streaks.
If those couldn't really seperate players I would check further results (semi finals and quarter finals etc...)
Seeing as this is totally based on acheivements another win for Nadal would put him pretty close to Kuerten and maybe ahead. After all, he would equal the slams won and with a good streak going on.