>>11486412019-2020 is what I can pry out from the net, Norrtåg is trying to get government subsidies.
Then there's the gauge change, I once saw a drawing of an over-platform change from swedish to finnish trains.
Railbuses used to travel the old route, but recent interest didn't take off before the railroad agency built a new route from Kalix to Haparanda. There are ideas to do something about the ancient stretch from Boden to Morjärv, but I don't think it'll happen until after Norrbotniabanan is built.