Oh yeah, some folk are saying that there are some quick scenes in the early part of the anime ending alluding to upcoming human fighters.
So as Brunhilde is walking we get a bunch of quick scenes.
1st scene is the Lu By Army.
2nd scene is Adam and Eve holding hands.
3rd scene is a sword dojo, likely symbolising Sasaki.
4th scene is Jack standing alone in a London street.
5th scene is an erupting volcano which is an important part of Raiden's backstory.
From here, we get some new scenes.
6th scene is an array of weapons pointing skyward in a wasteland. I saw some folks speculate this is either for;
I) Leonidas and that this is a scene of the aftermath of the 300's last stand.
II) Qin Shi Huang cause you know, war and stuff.
7th scene shows a big ol' slice of cosmos. Only speculation I saw was for Nostradamus. I guess the idea behind that one is the whole "reading stars to predict the future" jazz.
8th and last scene is a bunch of soldiers in a winter wonderland. This is just flat out Hayha, no questions asked.
Also looks like a completely ruined Valhalla Arena at the end.