So, 4Chan had lately a few solid leaks so maybe this one is also real? :) It says RDR2 on PC will be announced on April 22nd and will be releasing July 9th (Tuesday) on Epic Games Store and Rockstar Social Club.
"Howdy Partners, It's me again. Famous 4chan leaker. So i got some great news, and not so great news. Red Dead Redemption 2 will be announced for PC on the 22nd of April at 9AM PST (California). It will be releasing July 9th, 2019. The bad news, it will be exclusive to the Epic Games Store. It will not get a Steam release, this is not a time exclusive deal. The reason being is Take-Two made a deal with Epic, allowing Take-Two to take full profit on DLC released for the game. Valve currently takes a 30% profit from any in-game purchases."
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"Howdy Partners, It's me again. Famous 4chan leaker. So i got some great news, and not so great news. Red Dead Redemption 2 will be announced for PC on the 22nd of April at 9AM PST (California). It will be releasing July 9th, 2019. The bad news, it will be exclusive to the Epic Games Store. It will not get a Steam release, this is not a time exclusive deal. The reason being is Take-Two made a deal with Epic, allowing Take-Two to take full profit on DLC released for the game. Valve currently takes a 30% profit from any in-game purchases."
Source