That Kaga enka they just added... It's pretty good. It'd be great as a battle BGM. Well, movie battle BGM.

And can anyone confirm who's in the background?

Wow, fast. I was just searching to see if anyone was going to do anything about Enka Kaga.
It was quite a surprise to find out.

And Bucky is even copying Kongou's pose! "FAIYAAAAAAH!"

Here's hoping this Fubuki sketch makes it.