I was answering a question today under Forums because someone had asked "how we know so much about the characters and their back grounds?" Well I gave a pretty lengthy answer but it's worth mentioning again I think.
You see when you're as passionate about something as a die hard lion king fan you can understand where I am coming from. You see these characters as real, even though you know they aren't. It's about the extensive research into the minds and hearts of the characters we've come to know and love. I can't tell you how many what if? Stories and scenarios I personally have come up with and also have read and you know they always make sense in theory! But it's not the fact that it's not canon or that they will never (sad to say) make another sequel as good as the first but it's the fact that us fans have something to hold on to.
Let's take Kopa for instance,yeah,yeah we all know he doesn't really exist according to film canon but! That doesn't mean he doesn't exist! He exists because someone thought it would be cool to make a a continuity where Simba has a son instead of a daughter. And the way I see it, is that it's just an alternate universe...