The DC Universe is a stupidly complicated place. In an ideal world, all of the continuity would make perfect sense and everything would fit together perfectly. However, in a shared universe containing thousands of characters built by hundreds of creators over the course of several decades, this is just too much to ask for. Sometimes it's an editorial edict, sometimes the writer just messed up. So rather than staying up crying into our cereal attempting to decipher this hot, wet mess, we have created this handy guide. If you are ever presented with a retcon that just absolutely doesn't make sense, even in the constant reality-warping Multiverse-changing context of the DCU, feel free to shrug and pick a random item off this list.