"Future hope" is a bit of an exaggeration. He's the son of the current leaders - Kim Jong-Un - older half-brother, who was passed over as the heir of King Jong-Il, possibly in part due to being too westernized, and who has lived in exile for years. Any realistic prospect of Kim Han-Sol playing any leading role in North Korea would hinge on very substantial political changes in the regime, or on Kim Jong-Un losing the support of the army.