I've been working on developing a "Moneyball" type system of analyzing cricket statistics to make sensible predictions about how well players will go at the next level. My system is not nearly finished, but I've used some of the things that I've learned to have a look at some of the players who I didn't know much about in the IPL.
As the system isn't completed yet, I can't give too much justification, other than to say here are the players:
There is one other player that I would add into the list as players who I think might succeed, and that's Harmeet Singh from Rajastan Royals. I add him in, because I saw him play, and thought he was phenomenal, despite his numbers not being particularly impressive.
A number of these players my never play a game, but those that do are probably going to be worth watching. They have all shown (to me) that they are likely to be able to step up and succeed at the next level.