Just a thought about a similarity to Riku and Axel! If you watch DEEP DIVE, the BFU jumps off the building to catch the oblivion and he pulls out a second weapon, but get this: its not a keyblade but Axel's primary weapon! And in one of the trailers those same weapons are shown again on a brown table with Diz and a unknown talking! And get this, why does Axel and Riku have similar aspects: facial features, personality, and hairstyle? I believe that Axel is Riku's other side! Think about it!! If you need proof look at the pics and see how Riku is very hotheaded in the KH game just like Axel was in COM and the E3 trailers!