You gotta imagine Oda knows what he's doing with the sillhouette game and is aware of what people think of Shanks. You especially cannot draw him in 907 without question why the fuck he's there with the Gorosei in the first place.
So yep, either Oda knows this and is just absolutely fucking with everyone by drawing near identical silhouettes like so and this Knight is someone else:
Or it actually is Shanks. Crazy