"That is the secret of the universe. Billions of people, making billions of choices, creating infinite Earths. Some so similar that you could spend a lifetime searching for any distinction, others so radically different they defy comprehension"-Thomas Wayne Jr./Owlman.
Indeed the multiverse is made almost entirely of worlds where there is only one key difference between that universe and the one we're familiar with. Whether this difference is the individual's alignment (good or evil), gender or gender identity (male, female, trans-male or trans-female) or sexual orientation (homo, hetero, bi or pan) and with these small changes the entire universe around them is effected.
Now is the time to pay these other worlds a visit, but the first question is which multiverse?