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What if there is an asymmetry to the way matter and anti matter respond to dark energy.
Assuming that gravity is always attractive between both matter and antimatter in all combinations, if dark energy caused attractive forces between antimatter particles then only matter could escape the early universe. The combined attraction of gravity and dark energy would pull the anti matter back into the energy field where it would be recycled into particle-antiparticle pairs. You end up with a matter based universe expanding due to the interaction of gravity and dark energy with no detectable antimatter as it unable to escape the particle factory.