Since there has been alot of speculation for the flood returning in Halo 6, and the hint in the legendary ending, what would you think of the Flood returning and if so, how do you think it will affect the story?
In my opinion, I think Cortana is going to be tangled with the flood due to hints the gravemind was saying to chief in halo 3 plus halo 2’s ending. Possibly logic plague? Be sure to tell me whatever you think! 
This has come up a few times already, I recommend using the search function and adding to those.