I don't know if this counts as symbolism, per se, but some clever person on Tumblr recently made a post detailing how the first worlds the characters visited in BbS hinted at their fates.
For Terra, he becomes possessed--and that's something that happens to Aurora, when Maleficent is controlling her to get her to prick her finger.
For Ventus, his first world is Snow White (who, in her movie, goes into a temporary coma), and we all know what happens to Ven...
For Aqua, she goes to Castle of Dreams first: where Cinderella leaves behind her glass slipper. At the end of the game, Aqua leaves behind her Stormfall Keyblade and her Keyblade armor
Here's the original post about all of this:
http://bluerosesburnblue.tumblr.com/post/142100113846/bbs-foreshadowing