Europe - possibly. 380s - absolutely not. I think Europe is at the far edge of the 330NEOs range so unless management is okay with fuel stops happening on half of the westbound flights, it will have to wait for a different plane to arrive on the property. And the 380 was only mentioned because Singapore is going to start returning their early planes when the leases end and someone wondered where they would go. They're too big & expensive for Hawaiian. If they took a pass on the 350 earlier, there's no way the airline will say yes to the 380.

HAL