The "leak" was posted late last year. It talks about the specs and some games expected to launch with the PS5. I think this might be fake but the "leaker" says the revealed will happen between April-June (pre E3) this year so if that does happen then the leak might be true.
https://www.gamesradar.com/ps5-gta-6-2020-leak/

Another "leaker" posted these images of a devkit.

Update: These controller and devkit have been debunked.

https://www.youtube.com/watch?v=wm43g25qp7A

That PS5 in the picture looks really weird...

However, if Sony wants to draw attention over the E3, they might show something before the conference. That makes sense, yeah. And I'm expecting the PS5 to launch 2020 too.

The devkits usually don't look like the final product. This was the PS4 one.

Weren't these PS5 photos already debunked?

I thought that controller leak was found to be fake...

But I guess not? I don't care though this is going to be an interesting next few months. Can't wait to see what this thing is capable of.

I'm guessing if they're revealing it this early then they're planning for an early 2020 release.

Jason from Kotaku already debunk that , it's a fake controller and fake Devkit.

also new leak actually from pastebin 

https://www.youtube.com/watch?v=n7-O5SZYeuQ

And it seems it will be announced in 2020 not 2019 , because logically also this year Sony will not attend E3, Sony said they will attend E3 but not these year. So E3 still very important and that will be on 2020. 

They need to announce the PS5 already. It's taking them way too long. It usually takes a couple years for the games library to be any good after launch so they better get the ball rolling.

Such an obvious fake “leak”. Whenever I see specs and gta6 mentioned, I dismiss it immediately.

Can't believe sony will show something before most of the remaining big Games are released