That is true. Not going to lie, but that seal (Free power up) tho.
It could of been worse TBH. Boruto could of been given rikudou chakra which helped him unlock the Rinne-byakugan-tsenigan eye so that he could summon forth TSB balls and form the CT on his father's village.
I guess the only reason why they needed to retcon the Movie's ending is because Boruto isn't fighting another Otsutsuki in his younger years. This could be a good and a bad thing:
> Because we've seen future Bolt, he's still rocking his seal and eye.
> They could have him actually train/master his abilities overtime like how Sasuke learned to control the CS with Orochimaru
The bad side could probably be the power inflation. For instance, imagine if these seals are strong enough to surpass Naruto or Sasuke. That would be ... retarded.
My only problem with the seal would be if:
> Boruto doesn't have to train for it. That would like Naruto getting RSM and Sasuke getting the Rinnegan. It needs to be more like Naruto's Kyuubi's chakra and Sasuke's Curse Seal. It might not be your original power, but if you train with it over time and learn how to master it, you get respect.
The weird thing is though, Hagoromo went after Naruto/Sasuke because they needed his power to take down Madara (and Kaguya). Momoshiki was never interested in Boruto until he saw him in the afterlife. B/c Boruto was able to see him, Momoshiki said what he said (fate blah blah). Yada yada take this seal.
The knockoff of this happening (for future purposes) in the story, is that this seal could help Boruto feel alienated from the rest of his comrades since he'll be dealing with the alien plot now. At the end of the day I think Bolt needs to be able to fight Otsutsuki like Naruto/Sasuke in order to takeover when Sasuke gets old, kind of like his successor.
That's what I think IMO.