Well, art is, of course, subjective.
But I can think of a few examples with both of the Big Two where artists were placed on books they should not have been on or having "flagship" books stuck with subpar art.
It seems like you need a lot of different combinations to come together for a book to really sell, beyond name recognition.Apologies for the snark, but the argument is a bit silly. At the end of the day, brand recognition and marketing matter above all else when it comes to sales. Books with incredible art and writing can flop while books lacking in those areas can thrive. The s**tiest of Batman books would still sell better than a god-tier Metamorpho book. Yes of course there's the occasional exception, but this tends to be the case.