I think as long as the new owner leaves him the hell alone he'll probably stick around for the next few years.
I think his new Fins organizational 'structure' is pretty impressive. Sporano & Ireland are both relatively young and eager to make their marks. I hope Henning is mentoring someone to be his eventual successor...
More than that, if Ross is smart, he'll try to anchor The Tuna down with some sort of escalating minority ownership vesting program.