If you want Skyrim in NV then you are in the wrong forum. You need to be moved to FONV.
EDIT : Besides the races if Skyrim are not necessarily in the past. They may be in a time further into the future than NV. They are in another world and maybe in another Universe. So, transporting through time is moot.
I was wanting something similar but different from what ur wanting. I wanted what was done great in NV combined with a rich sandbox. Maybe in the future we can get a tes that has what skyrim did great combined with what morrowind did great with the excellent story consequences and directions the game gave combined with the combat graphics sandbox and graphics of skyrim. Hell goves us a fo style build that instead of int giving skill points to throw at skills we lvl up by doing the skills. The directions and info the game with an optional arrow and map marker system. Satisfy both oldies and newbies at same time.
I thought you meant you wanted iD to make a TES game, using their ideas and stories, including hardcoe mode, as a spin off just like New Vegas. If that was the case, then most certainly yes! But your idea? No. Just no.