I'll give a guess at ranking strength, at end of movie (tbh that will be when we know enough to rank properly, so):
1. Boruto
Or Sarada. Obviously. He might start off weak though like Naruto did, but he'll be top with Sarada by the end of the movie def. I'm gonna guess he'll be stronger than Sarada, because the movie's named after him. Would be nice if there were even, actually, but Kishi usually picks a fav.
2. Sarada
Or Boruto. I mean, if Kishi has learnt anything about writing female characters, then she should be in the top. Hopefully being Sasuke's kid, Kishi will write her okay. TBH, Sakura + Sasuke = pretty badass kid. She'll be in the top besides Boruto.
3. Mitsuki
Or the puppet kid. I'm guessing Mitsuki will be pretty tough, the mysterious characters usually are. Konoha village brats usually win over sand ninja too. A sand ninja who's not even important to name so far? He'll probably be stronger. He might be like Sasuke even and be stronger than Boruto at the start too. He seems to have some unique abilities so far too.
4. Puppet kid
I like puppet kid so I'm biased, but sand ninja are usually pretty tough. Again, he's a mystery, so he'll probably be strong. Same with Mitsuki really, the mysterious ones are usually the badass ones. I don't expect them to get over the main cast tho.
5. Metal Lee
I also like Metal Lee. Not sure exactly about this, because he was shown fighting puppet kid and looked like he was doing okay, but he's probably a taijutsu master only. Out of all the Konoha nin minus the main trio, he'll probably be the best. If he can avoid Shikadai's shadow possession shit with speed, def. (I'd think so.)
6. Shikadai
He'd beat everyone with his tactics, even boruto (I can see Metal Lee maybe getting through him because speed, and there might be other tricks other characters have). But this isn't a vs list. His actual abilities... he's probably a little better than Chocho, but I'll factor in his intelligence and make him better than inojin.
7. Inojin
Inojin would def be stronger than Chocho, even if she's one of my favs.
8. Chocho
Kishi sucks at women + chojis also not that great. Not sure how her mother will influence her tho.
Tbh, I hope this is completely wrong. And I'm not even sure what I was judging here, but yeah, this is how I feel atm.
Not even gonna bother with shin. Like if I'm judging by a single shin, he'd be a surprise. I don't think an army of clones are gonna enter the chunin exams.