Spoilers have been coming out very early for the past 2 months now, they're probably real considering most fakes go into much more detail. Will find out tues/wens I guess. It's possible Kisame and Hebi were fighting when they sensed Sasuke's chakra and ran to him. I think Kishi wants to get back to the story for now, Konoha and friends fight has been put off far too long. Hopefully this fight is more entertaining.