Hell, the costume reveal alone, and reactions from online or even forums such as this one also prove you can't please everyone!
But as far as pleasing the majority- not every film can be that special four quadrant movie that just hits at the right time, like Top Gun Maverick. Right now, Gunn just needs to make a solid film. I enjoy Man of Steel, but see how it's divisive, and there are parts of Superman Returns that I enjoy, even though it's just Bryan Singer's love letter to Richard Donner. With Superman in particular, there will always be defectors or those who just don't like the final product. I mean, there's no guarantee that Superman, and the DCU by extension, work out or reach the heights that Zaslav wants. By the same token, there's every chance that it works out in the end. So, again, they just need a solid film. Doesn't need to change the face of superhero movies.