My theory as to how the new KuramaxSusanoo works

[LoganightLegend]

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Kurama does not appear to be using SO6P power like when Naruto fought Sasuke at the valley of the end, but it does appear that Susanoo is and has replaced it's inner body created by the trapped bijuu with Kurama's body and is simply using the SO6P form armor. For comparison here's Sasuke's normal Susanoo and his SO6P one:

Spoiler

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[Blackzoro]

makes sense i guess since the chakra inside the armor were tail beasts chakra sasuke used to turn into lightning and the armor had a bow. its possible it can be using kurama to replace the body. this is probably the only logical way since sasuke was seen using perfect susanoo in gaiden. well just wait till the movie plays cuz its obviously going to show sasuke susanoo first before fusing it it cant just start out fused from the start.

 

[BenjerminGaye]

its iso susanno, all over again.

 

[Blackzoro]

its iso susanno, all over again.

whats a iso susanoo