Not only will DC Universe be getting newer comics one year after first publication, but also older comics that have been newly digitized and added to Comixology (and other online comic storefronts) will be added as well.
Every Thursday a selection of these comics are released for sale and you can see which ones have been newly digitized at:
https://www.readdc.com/new-comics
I’m not sure if there will be any delay between when they are offered on Comixology (etc) and when they will come to DC Universe, but they did state that we will get them!