Implementing DLSS would require reworking the rendering engine so there's temporal image data for the middleware to work with. Likewise, an implementation of AMD FSR 2.0 or Intel XeSS would also require the same. However, doing this would also allow TAA to be added. It's the kind of thing that wouldn't see happening until an expansion launch as they could release it alongside the first part of the graphics overhaul. That said, there's no reason why this couldn't just enable TAA, DLSS 2.0 (maybe even 3.0 as well), FSR 2.0 and XeSS all at the same time. Console users would still benefit from TAA/FSR and the PC audience can choose whatever works best on their hardware as well.
