Didn't all the hokages make it to the battlefield via body flicker? I'm pretty sure they did according to tobirama.lol, have you honestly seen anyone else in this manga cover such a distance with Shunshin? Even though there's little evidence to show he used FTG, it's absurd to think he used foot speed when a few chapters later he was unable to catch Zetsu who was a metre away from him.
The new indicator? How does that make sense? Throughout the entire manga lines have been shown to indicate movement and now he's using lines to show he used FTG when it's a technique that requires no movement at all?
@minator93: You didn't even refute the statement. It is literally absurd to think he used Shunshin to get to someone a few hundred metres away before the person was able to bring his arm down.