Yeah, because it'll be made clear and without a doubt that his Legion is an entirely new version of the team with new continuity to build.
And, again, the issue wasn't that a past version of the Legion went away, but rather that a following version of them wasn't put into play when Manhattan's world was created. They were just erased. If a new version of them is created and placed into the DCU then the metaverse is satisfied as we've seen with the Golden, Silver, and Modern reboots. None of them remember the one that came before. So long it's parts are put back into play and hope is present, the metaverse is cool.