Red Dead Redemption 2 is one of the best games of this generation. A totally success speaking about sales and many people discover the franchise with the second iteration. Rockstar could close the circle with a remake of the first game.
An unknown leaker on reddit has published that Rockstar is working on a remake of Red Dead Redemption. The game would use the engine of RDR 2 and would include new features (better hunting, fishing, new missions). Some actors, like Rob Wiethoff, are recording new lines. Expect an announcement soon. Scheduled for the first quarter or the second of 2021. Launch on PS5, Series X and PC.
Moreover, GTA VI should be revealed on summer 2022.
Take with a grain of salt and pepper.