Anything is Possible... it just depends on how much work you are willing to put into it.
The short answer would be "NO!"
We don't even have a complete Morrowind. Why are you worring about MORE?
Just askin' thought it would be pretty nice to add in the Silgrad district to the west of Vvardenfell. I wanna go through Reich Parkeep, Silgrad, The forgotten forest and the Velothis district in Oblivion.
Probably I have a computer coming within the week, but apparently I can't use it until Christmas... I might be able to use it when it gets here, but it's not really up to me. Don't know how, but I just think it would be epic if we could get Tamriel Rebuilt and Silgrad Tower working. Then get the Morroblivion worldspace into the Oblivion one.
Bigfoot, I don't want to rain on your parade, but the base Morrowind itself is Nowhere near Complete yet. At the moment there are two, possibly three people doing any significant work on it. I have an Extensive thread of things in Morroblivion that need addressing and so far John is the only one that has volunteered to help with any of it.
Who is going to do all this epic joining?
Instead of concentrating on finishing Morrowind, you are talking about diluting it even further.
I don't think you have any real idea of how much work you are proposing here...
It's cool, I figured it would be difficult tbh I'm happy with just Vvardenfell, but I think when I get the pc I'll try converting things to see if they work.