Although Destiny’s public beta will start on July 17 for PlayStation 4 and PlayStation 3 users, and on July 23 for Xbox One and Xbox 360 users, its content has not been officially detailed or confirmed. According to Reddit user zebruh, letters sent to GameStop managers detail that Destiny beta will feature “four story chapters, four competitive multiplayer maps, a cooperative Strike, and a huge world to explore with your own unique Guardian.“
Looking back, recent news suggest that the four Crucible maps are Shores of Time (Venus), Rusted Lands (Earth), Blind Watch (Mars), and First Light (Earth’s Moon).
Furthermore, thanks to another Reddit user, FWCReddit, we know that Destiny’s Beta download size on the Xbox One seems to be 12.63 GB:
To end with, some users who gained early access to the Destiny Xbox One beta are uploading some short gameplay clips to the Internet. Take a look: