Noblesse Oblige.

So I was wrong last week, Sasuke did not shape manipulate his Amaterasu into a cage shield, rather he set his premature Susano'o on fire. When Raikage went in for his Guillotine Drop finishing move, Sasuke counters with his right eye, which morphed (and can extinguish) Amaterasu flames on his Susano'o into spikes that Raikage will land on. Gaara saves Raikage from further damage and also Sasuke at the same time. Gaara fails to turn Sasuke back to the good side, and the Sand team and Darui goes in for the kill. Sasuke reveals his hidden jutsu: full fledged Susano'o with darkness that Shii and Karin both note at.

Things to remember: Sasuke's Mangekyo Sharingan abilities~
-left eye: Amaterasu
-right eye: Tsukuyomi, Amaterasu manipulation/extinction
-left+right eyes: Susano'o

All these abilities save the manipulation we have seen before in Itachi. However, the thing to note here is the embodiment of Sasuke's Susano'o. It is different in appearance than Itachi's. Now we know that, like the Mangekyo Sharingan, the Susano'io is also unique to the individual. Sasuke's has a gigantic claw and a dark aura instead of the light aura that Itachi had.

Here's comparison: