There is no "next Mike Trout." Let that be clear. There is no prospect this season who has that kind of immediate potential. But the question can still be asked if any of the current group can have a similar impact in fantasy baseball.
Every team handles their minor leaguers differently, and the call-up dates can have as much influence on a player's fantasy impact as his ability. So for the sake of this article, let us assume every relevant prospect was called up on May 1 and is placed in the starting lineup from then on.
The question to be answered is not, "Whose stat line will look most like Trout?" but, "Who is most likely to finish anywhere near the top in fantasy, despite missing a month of the season?"