Perhaps to show that Ranmaru’s existence there and interactions with a Nobunaga have an effect on the future? Remember how Nobunaga was supposed to die on the battlefield somewhere? Now we know that because Ranmaru made him retreat from the battlefield the course of history has changed.
hm maybe you have a point but they suffer for nothing and its unfair that ranmaru keeps getting blamed in every world.. its saddening...
That's story writing for ya. But all the unfairness makes a good ending more satisfying, don't you think?
i dont understand the time skips logic. he didnt even have any good experience in the other world, why was the time skip necessary