Earlier this week, fans were surprised when Warner Bros. announced a Shazam Q&A and unveiled the movie's official logo despite the fact Aquaman is supposed to be released long before it this December. Unfortunately, it's now being reported that the upcoming DC Comics adaptation hasn't been faring particularly well during test screenings (luckily, it doesn't sound like the movie is beyond repair).
There aren't any specifics here but it is noted that some people have actually had good things to say about Aquaman so it's far from doomed and there's plenty of time to go until it's released, giving Warner Bros. ample opportunities to fix any issues which may have arisen from those screenings.
It's also mentioned in the video below that Aquaman was developed at a time when different people were in charge of the DC Films division, hence why the marketing and promotional campaign is playing out in a certain way. The question is, will Aquaman be more like Wonder Woman than Justice League and is James Wan going to be enough to keep the project on the right path? It seems time will tell...