Hi, long time lurker, first time poster. Hope I've hit all the right marks. I had the urge to buy these games and actually play them this time and not just resell them, unopened, again! Found it digitally for what I consider to be a good price.
Taken from PS store:
Return to Arkham and experience two of the most critically acclaimed titles of the last generation - Batman: Arkham Asylum and Batman: Arkham City, with fully remastered and updated visuals. Batman: Return to Arkham includes the comprehensive versions of both games and includes all previously released additional content.
Arkham Knight might already be on your PS+ from about 2 years back, check your accounts