[quote="Flip_FTW"]If this is aimed at preschoolers, most of them don't know who Kovu and Kiara are anyway... They probably don't even know that there is a 2nd or 3rd TLK film. Which is why I think that the majority of screen time will just be the new characters and story. Just like in Timon and Pumbaa, the other characters make cameos from time to time pretty much to remind you its all in the same universe and cannon but other than that, its really just fan service / reference type scenes they appear in.[/quote]
While i do agree with your second point, disney does seem to be taking this somewhat seriously for a show aimed at a young crowd. Even just them having kiara in it means they were proud enough of the second movie to acknowledge it as canon.
My best guess is that they didn't have storylines completed when they announced it last year. On the international movie database there's a character listing for someone who wasn't in the original pr.