Leaked GTA V Audio Files suggest Casinos / Horse Racing DLC

What's the backstory on how this was leaked?
Seems that part of the content (in audio files) came with the GTA Online Beach Bum DLC.

So we might be seeing it soon.

Nothing definitive on if it is single-player focused, or for GTA Online, but Rockstar teased an upcoming announcement for single-player GTA V DLC not too long ago.
I ran into the Casino/Track while doing the skydiving side missions and was hoping they would make this a functioning building. This would be another great way to earn cash to buy up all the properties. Hopefully they make this available soon.
Well...yea. There's a big ass place in SA that says CASINO, that you couldn't enter. Im sure this will be a fine replacement to not having any burgershots being accessible!
Saw this on gta forums. I feel it's most likely cut content.

Edit. I just had one of those cut scenes switching back to Trevor with him being kicked out of the casino for cheating.
In-game gambling in GTA is very dangerous.

I'm sure it'll be a nextgen feature in all microtransaction games. Risk is innately exhilarating, especially for gamers who are easily parted with their money.
Good, because I would often visit the casino and racetrack and shake my head wishing they were actually utilized.

I had chalked it up to them either running out of time or running into a snag with states individual gambling laws (since the game takes real world money in online).

I hope they also make use of the amphitheater they have. Would be tits to listen to actual artists performing there. Maybe that'll be a future heist location as well?

Rockstar Games said:
This is just the first of many new content updates we're working on for Grand Theft Auto Online in the weeks and months ahead. Please stay tuned here at the Newswire for word on the forthcoming Content Creator, full on cooperative Heists, and GTA Online's take on Capture the Flag - plus info on some exciting new Story Mode updates as well. We'll have new info to share on all of this very soon.