It's a cool cutscene, but a COMPLETE WASTE of a cutscene. The whole "corruption" aspect was never explored later in the game, in fact it was dropped completely after the switcharoo they pulled when Zant shrugged it all off. The Fused Shadow were no longer a danger, since it was completely under Midna's control, and no longer important. Sure, they put some effort into a plot twist by bringing Zant front & center, but making Link "go bad" would've been much more interesting.