You don’t think he dreamt of lifting a cup as a leaf as a kid? There’s only one team he had in mind. I would say there’s a great chance he’s an oiler for life but the door is open a crack.
I wouldn't be surprised if he takes a victory lap with Toronto, but I don't think there's much of a sliver for him leaving prior to this next contract given that Drai already resigned. The only chance would be if they win this year and he considers Edmonton-mission-accomplished. If they win this year, I'd say maybe there is a chance he gets traded this summer (since otherwise they will certainly sign him)
I would say that current friendships... guys he literally loves... real people, real teammates... would trump childhood nostalgia pretty easily. This is a close team.
This team has been knocking at the door for three years, it hasn't been their turn yet, but I don't see McD leaving until he's taken a couple more cracks with this group. Maybe then, if the environment changes he could orchestrate his own trade.