At least the world in Naruto's universe is going to be larger... The Sage of the Six Paths said nothing for the origin of his mother..., only it was nothing important. But again there have some Palace in the Winter World. This world is like that of Haku's village. The change of the climates remember to me that story of the Devil, his four daughters, which represent the four seasons, and the Mirror. (well, the Lava World and the Sand World both are in the "Summer Season").
The place, where Sasuke falls, seemingly is like the Country of the Wind. It seems Kagyua summons the dimensions with the Third Eye.
The scene with the Male Sexy Technique was lame...