The Lion King II: Simba's Pride (1998)

Continuity mistake: Toward the end of the song "One Of Us" when Kovu is running away and the birds are chasing him, Simba is standing on Pride Rock looking down at Kovu. In the next shot of Pride Rock, Simba is gone, but in the next shot, Simba is back, in the same position as in the first shot.

Simba: Kiara.
Zira: Kovu. Move.
Simba: Stand aside.
Kiara: Daddy, this has to stop.
Zira: You're even weaker than I thought. Get out of the way.
Kovu: You'll never hurt Kiara or Simba. Not while I'm here.
Simba: Stay out of this.
Kiara: A wise king once told me, "We are one." I didn't understand him then. Now I do.
Simba: But - they.
Kiara: Them? Us? Look at them. They are us. What differences do you see?

Trivia: At several points during the movie, such as when Kiara and Kovu are running from the rhinos, music that would later be used in Pirates of the Caribbean: The Curse of the Black Pearl can be heard playing.

Question: At the end of the "We Are One" song, Simba and Kiara have returned to pride rock around sunset. Fine, fine, but the thing that's been bugging me for years is: Kiara stares intently at something, causing Simba to frown and look up to see what she sees. He seems to chuckle, then turns back to her. What is it that they were looking at before he says "You'll understand some day" and why is it there?