Walmart Canada has a knack for leaking game releases somewhat early, and Death Stranding is the next in line it seems. They listed the game on their website and apparently revealed things too early, kind of like they did before E3.
Just before E3 2018, Walmart Canada posted a pile of games that weren't released yet and many people were not aware of. RAGE 2, Team Sonic Racing, Just Cause 4 and Gears of War 5 were among the leaked games, and they got announced mere days later.
The same website now posted Death Stranding for PS4, with the shipping date set for 30 June 2018. Initially, it wasn't clear whether this was a placeholder, but since it's a Sunday, it is highly unlikely we will see a release at that exact tdate. Then again, it's Hideo Kojima we're talking about here, so pulling a stunt like that wouldn't even be weird in his case.
Walmart Canada, however, clarified that this is indeed a placeholder date, but another tweet stated that June 2019 is the month when the game will ship. This caused quite a bit of confusion, but since the statement about it being a placeholder date is more recent, it could prove to be the correct one.
On the other hand, Walmart Canada may have simply retracted their earlier statement as to not cause conflict with Game Awards, after Geoff Keighley called them out for spilling the beans. Keighley is known to have associated himself with Kojima on various occasions, so exclusive Death Stranding announcements during his show could be possible.
Keep in mind that neither Hideo Kojima nor Sony confirmed these claims, so take this info with a grain of salt.
It's highly likely no official info will come before Game Awards either, but considering the show is starting on 06 December 2018, it shouldn't be a long wait before we get more info regarding Kojima's latest endeavour. It may be odd that he would pump out a game so early though, especially because people still don't even know what it is, or whether it appeals to them.
All we know is we will play a courier version of Daryl Dixon and will be confronted by John Cena, err, invisible creatures, while eating tiny fetus-like things to prevent a rain making us old.