I was just planning to play Witcher 3 and I really have no idea what I'm in for... HE DIES!? OH GOD!! Well, I suppose you're right man. I think some things are just plain inevitable, and you're right. For all we know, Kratos' son could be the next protagonist, and he might even be better than Kratos! Let's not hope Clementine dies in the next installment of the Telltale Walking Dead game o.o
I never really said what happens You shape his destiny. But anyway it ends, the official statement from CDPR was that it will be the last game for him. They want to end it on high note, and they surely did. Especially when they released the last DLC.
Going a bit off-topic, but in case you haven't seen the trailer for the last DLC they released, it is so frigging epic.