For everyone else's, I was always like "Please get back to the main storyline", but with Hashirama and Madara, we learn more about their background(Which people have been speculating about for years)
We've come a long way, you guys.....remember when people use to say "Hiruzen>Hashirama"? Man, have we advanced from such ignorance.
Hiruzen was mad quiet since his revival. And for Minato, the first two hokages don't respect him much, but they'll learn what the deal is!