i have and currently travel that market extensively and i cannot say i have heard that rumour. unless hawaiian has excess capacity and equipmrnt idle, they may want too test the market by putting in a dc-10 but i think it would be remote. canadian as sure you know controls the market with air canada and canada 3000 tied for second.
hawaiian would need a canadian distribution system lined up to sell and market the service and their frequent flyer program would be of little interest here in canada.
i will bet against it.