It doesn't matter if Little Caesars pizza is the cheapest option, if there aren't any other pizza options, consumer welfare is severely negatively impacted because some consumers won't like Little Caesars.
Ruth Bader Ginsburg—despite being lionized by liberals—was an extremely pro-business justice who played a strong role in the Supreme Court siding with businesses in all but one antitrust case from 1995ish on. With her gone, I think this case may actually have a chance