I know anime's end when they end. If they complete the main story, we'd pretty much just get a couple of months of filler between major arcs. Any more than that is just beating a dead horse and you'd have to move on.
They have filler during the tournament, but I have a feeling that its pretty much over.
I cannot remember exacly,but I think it was on Serebii at one point. I can't seem to find it. Regardless we have the last 5th gen movie in Jap. In March or so of next year. So maybe no exacly 3 years,but around it. However if I can find it,then I will post it.