Reportedly, rumors also suggest that things from Destiny, such as characters, maps, gear, etc; won't be carrying over to D2. It seems Bungie is hoping to make D2 an entirely new game, and not just some measly expansion that improves a few things like TTK & RoI. Destinations and maps should be more populated and have more interesting quests due to scrapping last-gen, according to reports.
I don't know why, but, for some reason I just absolutely DREAD the idea of having Destiny on PC. I'm going to guess it's because I know a LOT of people are going to transfer. Without me. I don't have a nice PC, not even a Laptop. I guess I just like the way the community is now. Just my 2 Cents :)