I think Mathew Barzal should be the prospect that the Islanders promote. He was drafted 16th overall last year by the Islanders, a pick they acquired in a trade, for Griffin Reinhart (thank you Edmonton).
Barzal is a guy you continue to hear good things about. Many believe that he has actually leapfrogged Michael Dal Colle in the prospect rankings despite being a year younger than Dal Colle.
The Islanders are going to be trying to get rid of some dead weight contracts. Nikolai Kulemin, Mikhail Grabovski, and Josh Bailey would all be candidates for the Islanders to move in order to free up some cap space.