Board Thread:Off Topic/@comment-25405817-20160511154306/@comment-7622429-20160919104946

Really, as long as certain thematical backgrounds leave enough wiggle room, you could crossover almost anything. Of course, when you come into conflicting elements, then comes the hard part. For example, when I implemented my own takes on the Flash and Zoom in my own series, they normally have the Speed Force as a major part of their characters. However, I needed to keep things simple, and thus gave them the same source of power as literally everything else outlandish, from simple supersoldiers to massive daikaiju.