What do we know so far about mesh creation? Ever since Oblivion the community has had to create their own exporters and importers for NIFs and create convoluted work arounds to create simple pieces of armour. Do we know what file format they're using? Do we have any information on exporters or importers? Will any be released?

We do not have any information about asset creation tools yet. The NIF will most likely be used.

Our best hope is they're still using the same NIF format they used for Skyrim - but it's not much of a hope. There are very likely changes, and very unlikely there'll be any official exporters/importers

Probably the same NIF file, different format. As in it needs more information.