It will probably be ages until a story mode dlc is released but wouldn't one where you play as Sadie Adler 1899-1907 or Landon Ricketts be cool!

Sadie Adler DLC would be nice ?

Unfortunately I don't think it will happen, but if I did I'd love a Rdr1 remaster in Rdr2 but with entirely all Rdr2 features.

Undead nightmare 2!!!

Undead Nightmare II or Landon Ricketts in his golden days.

Undead nightmare would be awesome but I believe they are too busy with GTA6 and RDRO updates