Switch 2 port with a ps5 and Xbox version is my guess. I'm definitely hoping for some sort of single player content for rdr2. Anyone who thinks it's rdr3 related needs their head checked, Rockstar isn't going to cannibalize itself with a rdr3 announcement during the gta 6 marketing window.
A red dead redemption that follows jack shouldn't happen, as it would no longer be the wild west. Why people think a story centered around Jack is possible is beyond me, no way it'll happen.