And IMO, Superman works best when he's THE hero, not part of a team or an otherwise crowded comicbook continuity.
And yet he's been a core member of the Justice League many times over the decades. We've already had several shows where Superman (or Superboy) was the only hero on his world -- plus one (Smallville) where there were a bunch of other heroes but technically no Superman. Might've been nice to see them actually try it a different way for a change.