All of the following stories feature DC characters in crossovers.
All stories take place in their own continuity, unless noted otherwise.
Also, look for stories in the future devoted exclusively to DC characters in cosmic adventures. Shards of Destiny Two universes team together to survive. Dark Allies Takes place in same continuity as Shards of Destiny. Soul Brothers Takes place in same continuity as Shards of Destiny, starring Adam Warlock and Batman. Worlds Colliding Taking place in the DC Universe with Galactus crossing over.