[Allyn Gibson]

gastrof wrote:

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Looking at the cover, I can't help but wonder who the guy to the left of Superman's right knee is.

Hmmm...

Seems to be a bat symbol on his chest, the outline looks almost like the Superman shield, and the costume colors are red and blue. Chris Kent with a change to his Knightwing costume, making a connection with his adopted father?

Yep, and

Flamebird is above Supergirl. The one unfortunate thing about Nightwing being right there is that now we know that Chris Kent gets "de-aged," since he just aged to about eighty in the most recent issue of Action Comics.