You know I always beleived that you should get the barest story when you play on Easy mode, get the general story in normal mode, and the whole complete every little detail know the loose ends that are suppose to be tied up are without a doubt and you know the main characters mothers favorite song level of detail story for hard.
As it was done in Gunstar Super Heroes? The story is mind-numbingly stupid on Easy. "OMG we're benig attacked! You there, go fight them!"