New York Islanders coach Barry Trotz last week said that two lines were locked in – the Barzal–Eberle combo (with assumed linemate Anders Lee) and the Martin–Cizikas–Clutterbuck line.
That leaves some flexibility on the second and third lines. We know Nelson will be 2C and we know some combination of Bailey, Komarov and Beauvillier are locks at three of the four wing slots. Brassard looks to be as close to a lock at the 3C role as you get.