According to an insider named Tez2, Rockstar was planning to remaster Red Dead Redemption and Grand Theft Auto IV, but in the end they went against it after seeing the reception to Grand Theft Auto: The Trilogy—The Definitive Edition.
Tez2 had some very accurate leaks thus far and here’s what he said on Twitter regarding the mentioned remasters:
“As per a reliable source with clear accuracy on Rockstar plans, remasters of GTA IV and RDR1 were on the table a few years ago, but Rockstar chose not to proceed with the projects in mind. The poor reception of the Trilogy DE might be a reason behind that decision.”
Grand Theft Auto: The Trilogy—The Definitive Edition wasn’t received well overall and it had a fair share of issues upon issues at launch (visual problems, licensing issues, etc…). But hey, life can be cruel sometimes.