More from TV stills (bottom right):
Source
Interestingly, in the first pictures released a day earlier it seems the young Kim was (purposely?) cut out of the picture. Which is a little odd...
Controlled release? Giving it extra little suspense. Certainly, NK did not draw attention to Kim Jong-eun's picture af first. Then we have this tiny grainy picture on Rodong Shinmun. Now it seems that press went back to the previous footage to pinpoint the guy which fit the profile of the picture on their party newspaper.
There is a joke going around in SK that the regime fatten him up intentionally to look old. However, I doubt that. He can do it on his own. His genes are lopsidedly in favor of obesity.