Here's my first thoughts:
- Dragon Ball Super: Super Hero is a bad title.
- By Hero I can imagine characters like Jaco and Gohan having a good role in this movie, it could be interesting... Well anything better than another Goku & Vegeta movie.
- Is this movie already confirmed to be in CGI? If not I don't see why people are reacting so badly about a small teaser.
- I almost fell off my chair when I saw Pan design, though this would be set in EoZ, but it seems it will be 2 years before 28th Tenkaichi Budokai? Meh... But that also implies that Goten and Trunks should get new designs. If not, I can see fans going to protest with banners and flaming torches in front of Toriyama's house
- The supposed villains reminds me a bit of the Subway Bosses from Pokémon Black & White. They don't feel menacing at all, I can't picture UI Goku fighting those fellas.
- I'm okay for a low stakes movie, considering we're getting close to final chapter of the original manga and it wouldn't make sense to have a conflict so close to it.
Well if you're referencing Digimon Adventure Tri I can see why you were disappointed as it was not that amusing. But have you watched Digimon Tamers? I think it's arguably the best Digimon series, I have rewatched the past year and was impressed by some mature points of the story I never had got the first time I watched when I was a child.
I don't think it's unexpected at all, we see that by the time the Ginyu Force shows up, Toriyama has a thing for super sentai themes, Gohan coming back as the Great Saiyaman with his silly poses so as Jaco in RoF further reaffirm this.