Remaking Solstheim is something that I'd say is actually do-able, considering you already have the vast majority of the models at your disposal. Remaking Morrowind in the Creation Kit would require an immense team of dedicated modelers, animators, interior/exterior designers, scripters, quest-makers, and many more people to get that done. I don't want to be a nay-sayer. I'd LOVE to see this made, but getting it done right takes time. Getting a team together would be the hardest part. If you don't believe me, go look at Tamriel Rebuilt. We've got about 65% of it done for the original Gamebyro engine. We started 10 years ago.