Yup, give us ACTUAL secret ending, but comes an issue again, with DLC. They have to wrap up endings in some way where V lives. Because giving mid game dlc without altering the endings is plain stupid, already rushing to save yourself and just out of nowhere do more random missions.
Post game needs V to be alive, since giving some another random character would make any customization or anything that you achieved during game pointless.
Prequel? Well that would just be sad as hell, knowing where it all leads.
They either need to choose a canon ending or tie them up in a way where V lives, maybe as engram or not.