I think this movie is ignoring GT like it doesn't exist. Maybe possibility of future movies or maybe a new series? I'm hoping for a new series.

I never liked the idea that the dragon balls wishes create negative energy. That would mean Dende/Kami are indeed evil ignoring the fact that the dragon balls need a 1 year cool down. The Namek's dragon Balls being around longer and maybe not as many wishes but I assume more wishes made over time (I think less of a cool down), would mean there should be a large amount of dark energy built up. So I'll go with continuity errors on this part.