Justice League vs. The Legion of Super-Heroes (2022) #4

Now it's the Legion of Super-Heroes' turn to get stuck in a time they don't belong in: the 21st century. Time for the greatest heroes of the future to see the reality of their heroes of the past. All this is happening because the Great Darkness is coming, and even as the truth behind it is about to be revealed, it may be too late to stop all from becoming nothing. It's the heroes of two eras in ways you've never seen them before!