I don’t necessarily see a conflict between Osiris and Rasputin, more so between Rasputin and humanity. There is no conflict that is exclusive to these two. The actual conflict will be between the two moralities of Rasputin: Saving himself and saving humanity. I also think that Osiris’s role in this is acting as the reminder to Rasputin. They are some of the few individuals that not only know what is coming, but have have also seen. But they are the only two that have seen the consequences of what’s coming. Osiris saw it in the Forest and Rasputin lived through the collapse. That’s why Osiris was the one two remind Rasputin about his past betrayal, since he knows how dire the situation is. In general, this is a beautiful mirror of Rasputin’s most important choice ever and will therefore somewhat concluded a personal arc. Rasputin has had to deal with the consequences of the choice he made during the collapse and now he has to make that choice again, but in a changed world. Not that he seems to have any regrets, but the prospect of facing his biggest defeat again might trigger something in him. I hope Bungie makes Rasputin his own character and actually separates him from Ana in this season.