The first illustration, by Brent Sprecher, is from the upcoming Retrostar rulebook.
The illustration below, by Nolan Segrest, is from the upcoming deluxe series book for CAH:S3 called The Complete Guide to Warriors of the Cosmos. It depicts Ma-Cho, a character who was used as the series' focal point during the last bit of its run..
The final illustration, by Nolan Segrest, is also from The Complete Guide to Warriors of the Cosmos. It introduces the world to Kree-Churr, one of the series' characters from the fifth season.