Why Raikage didn't consider Minato using Body Flicker in their fight? In his fight against Raikage, Minato spread his marked Kunai to many locations.
It seemed like the Raikage was very sure that Minato would only appear at the marked area/kunai.  

My question is, can Minato appear at unmarked location using Body Flicker? I think he obviously can. If so, then why Raikage didn't consider this in their fight?
Minato's Flying Thunder God Techniqie allows him to teleport to any location which he has previously marked with a hand seal (either on a kunai or with his hand). The jutsu, which was Originally created by the The 2nd Hokage (Tobirama Senju) was perfected by Minato to the point where the "hand-marked" seal never disappeared from whoever Minato marked.


  Both Tobirama and Minato were famed as the fastest shinobi during their lifetimes. While both were very fast on their own, the Flying Thunder God also contributed to their fame.


The reason why Raikage A did not anticipate Minato's offense was because he did not know enough about Minato's Flying Raijin Jutsu. The rumors about Minato would have spread tales about how he could teleport to whatever Kunai he threw around but apparently Minato also had "some extra's up his sleeve" which only a few people knew about.

Minato was actually very fast in normal speed. To be able to react to Raikage A's top speed on lightning chakra mode and even counter attack.


  Before the Flying Thunder God Technique can be performed, users must first mark a target with their "technique formula" 


Minato did not "just magically appear" at the back of Killer bee during Their Fight, what actually happened was that Minato used his hand to mark Bee a split second after dodging and cutting his tail. Raikage was trying to figure out which of the kunais that Minato would flicker to, little did he know Minato had already teleported to the mark he placed on Bee.