Developers from Volition announced that on December 8th they will update all copies of Saints Row IV to Saints Row IV: Re-Elected. This includes Saints Row IV: Game of The Century Edition. This means that players who own Saints Row IV in any capacity will be automatically upgraded to Saints Row IV: Re-Elected and will therefore have access to the included DLC packs.
All other versions and individual DLCs will be discontinued from December 8th and will no longer be used. All your saves and achievements will be moved so you can play as usual. Mods should not be affected.
This change will go into effect for Windows players on December 8, and for Linux players at a later date.
Along with this update, the developers announced that cross-platform play on PC will become available for Epic Games and GOG players.