My theory is that since this is the same artist who drew "Trials of Shazam", he was upset that because Mary Marvel was in a coma he in that book he didn't get to draw the multitude of panty shots that the lousy artists of Countdown gave the similarly underage Mary in that title. So now he's making up for it by drawing panty shots of Mary's Martian doppelganger aka the (so-far) nicest girl DC has left.

That or he just like to draw cheesecake of green-skinned teenagers.

It's just a theory.