With the darker direction of marketing, I don't think the general audience will be much excited. The movie still looks pretty much redundant.
The fact that WB decided to schedule this in October makes it bomb harder. It reminds me of their choice for dumping Geostorm or Pan. Where the Wild Things Are did not reallt break out the way lots of us expect it to do. Second half of October is usually a dead zone for potential blockbuster, unless you have strong sequels like Scary Movie, Jack Ass or HSM. Casual moviegoers will skip this and spend their dollars on the new Halloween movie.
Personally, I feel pity for Andy Serkis and there is no going back for him. My best wish is for it to do Tarzan's number.