I don't really have a horse in the Marvel/DC rivalry but I would honestly love to see this be a massive success just to watch Marvel stans seethe. They've been too complacent since the Disney acquisition and The Avengers. They started a smear campaign against this on Tumblr after the trailer got a great reception (saying Harley Quinn's "the voices" line is ableism

and the whole Leto being the Joker meme). This won't be nearly as easy to drag as BvS though because it actually looks really good.