When I saw the titles I didn't know what it was going to be about, but I did some research. It's going to be about the fight of the close combat quarters (Kakashi, Gai,...) against the swordsmen and the girl who uses scorch release who's named Pakura. She was revived by Kabuto together with the 7 swordsmen. Kabutowari is the name of one of the 7 swords and Jinin Akebino is its wielder.
I'm happy they're making fillers like this. I saw alot of people on Narutobase asking/hoping the anime would expand on this fight and they're doing it .
Oh and did you guys know this already and am I coming a bit behind :p?