David Chase has said Furio won't be back, I don't think the ending will be too far fetched, probably more along the lines of continuing what's going on now.

Maybe Tony is going to get assassinated but right before the hit goes down the FBI arrests him.



Long as I remember The rain been coming down.
Clouds of Mystery pouring Confusion on the ground.
Good men through the ages, Trying to find the sun;
And I wonder, Still I wonder, Who'll stop the rain.