That, my friend, is all you. It is quite a guessing game at that age. Your best bet is to look at the parents to get an understanding of what they could become in time. Those that have awesome stock, such as Andrew and Ben from AAR, have babies that 8 times out of 10 will become trophies.
Maybe Ben could be of better help here as he breeds a lot of jungles and knows what to look for in holdbacks.