I dare not open that link in fear of what I may see. Could you tell how much importance she'll have from that trailer? It's Pierrot, so I would expect them to heavily embellish the moe brat no matter how distant she is from the core plot of the story, glistening sweat droplets and all.
None. She's there to be the mother that Boruto will get pissed because of Naruto.
I'll tell you my thoughts on the trailer tomorrow, but from what I got, I'm not exactly hyped. It's...eh. I think the problem is that the movie is making it feel like very filler like. The villains are definitely not going to be interesting and Naruto and Sasuke are the main star, as Boruto jumps in to be the successor. It's...generic.
Best you can write huh. After Gaiden, I doubt your skills.