The smart move the way I see it is to end Boruto in whatever way doesn't really matter, leave it for some years in order for people to not have as strong feelings towards it as they do now, to forgot a little bit about it. Then announce a movie. I say a movie because they need something big and also small enough to get people hyped for it. Coming out with a manga or anime continuation won't have the same effect. Plus I've always believed that the best way is to redo the Naruto vs Sasuke fight. Why that point? Well because no one will ever reboot the whole series or start somewhere at the halfway point. That's just too much to erase. But mainly because having a fight especially a good animated one on the big screen with those two will be the big thing that they need.
I rather redo the whole Ninja War arc starting from the end of the Pain Arc. The whole situation, (exclude Naruto meeting Kushina) was a hot mess that even affected the hyped Naruto Vs. Sasuke Part 2 fight. Do a number of changes and do it ala Mortal Kombat 9's plot (without majority of the good guys died at the end).