Board Thread:Theories and Speculation/@comment-29033274-20160713180744/@comment-1512913-20160713201551

I don't think that counted as Wind Release: Rasengan, since it wasn't really a perfect compressed sphere, but a round unstable mass of wind release chakra. So you could say in this filler, Asura used a proto/pseudo/imperfect Wind Release: Rasengan.