I thought the issue was ok. I enjoyed the artwork, but some of the story bothered me a little.
Didn't mind the introduction of a 'new' villain, although the Japanese look was cliché. Sun Killer sort of renders Sun Emperor redundant, however. The new look Mon-El GL still hasn't caught on with me. I wish another character had been chosen to join the Corps. The fight scene where Dyogene has to help defend Mon from the red sun rays, but then Mon knocks Killer out with a finger flick was all kind of goofy to me.
Prediction: The blue baby is most likely Krona, who will grow rapidy to full grown villain, similar to how baby Highfather was magically summoned and grew to fight Darkseid in GDS. Harmonia Li is directly linked to blue baby, and will help the Legion and GL Corp to fight it.
Nice seeing Gigi. I would like to see the original Shvaughn Erin as well, but I'm afraid her character Jumped the Shark back in 5YG, and Paul probably won't use her again.
Really looking forward to the Academy story.