Originally Posted by samsonlonghair
Its Sai thats with them, not Neji. And I can't imagine what would cause them to 1) know that Kisame is about to fight KB, and 2) alter their objective of dealing with Sasuke.
Its more likely that the cloud and mist would be moving out to search for KB. If fact, Raikage was already putting together a search team in this very chapter.
In spite of the alliance, it really doesn't make sense for sand and leaf to deal with the Hachibi. They need to protect the Kyuubi and let cloud and mist deal with the Hachibi.