Re: That's Jay and Joan?
They're suffering from the Kent syndrome. When Smallville was at its height, the Kents were suddenly in their late 40s and had blonde hair with only a touch of grey but with Smallville waning (and John Schneider gone from the show) the Kents went back to 60 or 70-somethings. It's all up to Editorial to set the look or the artist (if Editorial is asleep on the job). Jay should look like he's in his 50s at least (greying but in good shape) while Joan should be in her 70s or 80s.
The fact that the remaining JSA members (particularly Ma Hunkle, Alan and Molly and Jay and Joan) are tied to the WWII era makes it relatively easy to guess their age (and hard to de-age them without the use of magic). Jay looks like Ray Palmer here and that really shouldn't be.