I don't have the budget to render an introductory paragraph.
One of the fun things about doing this Primer series with Sam is that even when I'm telling the complete truth about what's going on or the reasoning behind some character's actions, the answers can often be so outlandish that he still won't believe me.
This primer series is definitely intended to help people understand what's going on in Kingdom Hearts. That said, it's also been great for me because doing it with Sam has been a great way to uncover a lot of the common hangups, expected and unexpected, that make it difficult to parse through.
I still firmly believe that the overall plot is pretty basic, but a terrible job was done in presenting that plot. The confusion comes more from presentation and mistranslation than anything else.