In response to post #43573125. Immediately, no. Scripts are supposed to be compatible out of the box both backwards and forwards, however SKSE won't be immediately available. In addition, Bethesda has moved from .bsa to .ba2. They're also using a similar but not identical system for meshes and textures to Fallout 4 for the Skyrim Special Edition. I haven't even said anything about how long we may have to wait for the Special Edition Script Extender Eventually, everything could be compatible both ways, but it can take a while just converting files and cleaning up meshes and textures. Unfortunately, it has been stated that animation replacer will for the most part be entirely incompatible due to the updated 64-bit Havok physics.