One thing that Marvel has (in spades) over DC right now is continuity in its universe. Marvel has taken the time to meticulously weave its story lines between characters in a cohesive way so that anyone can understand the timeline. DC is playing catch up with Marvel at this point and, if all the new Justice League trailers are any indication, I'm not sure if they've got it right just yet.
At the Las Vegas convention, Warner Bros. presented new footage from Wonder Woman and Justice League—and the first footage anywhere of Aquaman, which hasn’t even begun shooting yet. And with each, it really looked like the DC Films may be on the right track.