If you don't mind me asking, who are those players?
And your prediction is extremely bold. Predicting the best player in the world under 25 years of age (by like a huge distance) has 0 chance to win another Slam? Either you know of some prodigy kid about to emerge, you believe the current top players will last far longer than usual or I dunno. But I seriously doubt you'd put your money where your mouth is anyway.
The 5 players are:
Let's be patient for a couple of months and see who does better
I'll give you three players that will be ranked higher in twelve months than they are now:
Djokovic, Murray and Del Potro.
Djokovic? I think he and Federer will be the top 2, maybe like 1000 points ahead of Nadal, because Rafa is expected to miss a couple of big tourneys now. as for #1, Fedole 50%-50%.
Murray? I hope so, but I doubt it. I think he needs a Slam to get ahead of Rafa.
Del Potro? Higher than his current ranking (9), but not higher than his ranking at the race from January (6).
Yes, he did. Which would be relevant if the OP had predicted him to storm Wimbledon 2012
This is probably Juan's worst surface, but same thing goes for Ferrer. David is a better player right now.