As someone who has played the game to completion, trust me, this isn't a spoiler.

It's not saying who's death he sees. only "Your"s. Therefore, I can only assume how Xenoblade's plot goes is that he somehow crosses over into the real world and saves the player from his own death, whenever it may be.

In that case, I'm going to have to construct my own death to be flown into Outer space on a Turkey. Mainly because I want to see Shulk's face when I'm flying on a turkey into outer space.