This category is for crossovers that were overlooked, omitted, or released after Win Scott Eckert's Crossovers: A Secret Chronology of the World and Sean Levin's Crossovers Expanded volumes.
While indeed official, they have yet to be verified for inclusion in the Crossover Universe.
For a complete timeline of all Additional Crossovers, check out the Additional Crossovers Chronology.
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