There is quite possibly a remake of Morrowing using the Skyrim engine similar to the http://morroblivion.com/ remake that used the Oblivion engine, which is where any assumption he is making about a remake will have come from
In terms of TES:VI your friend (no offence) is lying or at least making assumption with no evidence, he doesn't know and Bethesda would not have told anyone yet, they probably don't know themselves yet. They didn't reveal Skyrim until 11 months before release and we are at least 4 years away from the next game in the series so
Yes but they had the name "Skyrim" copyrighted right after the release of Oblivion. They won't announce it for a while, however with a bit of detective work there's definitely a way to find out which game is next in the series. People on the forum had speculated Skyrim for at least 2 or 3 years before it's announcement.
Probably, but I seriously doubt that Bethesda would make a remake. There are hundreds of mods out there that can make look Morrowind very good - at least as good as Oblivion, so people probably wouldn't pay again for something they already have bought, and could upgrade for free.
Second, it wouldn't be easy at all! Some things work different in the Skyrim engine, like there is no Levitation in it, while in Morrowind there are many places you couldn't get without it. Just think of the Telvanni Towers! Before you would say that they could put levitation in it, I don't know if the coding of the Engine would allow that. Probably it would, but there is a reason why Bethesda didn't put that in Skyrim. (Sadly. I miss levitation!)
Thirdly, when Bethesda dropped the Ministry of Truth on Morrowind, they have technically gave the finger to all those Morrowind fans who were begging for a game where they could return to Morrowind. In myopinion this looked like a pretty clear message on how Bethesda feels about this topic.
The reason they stopped using levitation is because the cities are now separate cells and are no longer one big exterior cell like in Morrowind. If you were to levitate above a city in Skyrim you would only see the LOD meshes and textures and an empty city you can't interact with. However with a high end system you could get around that and make them all one big cell again. I know they did it with Oblivion and with they Total Conversion of Oblivion, Nehrim.
Am I the only one who would want TES: VI to be in Valenwood?
I thought guerilla fighting the Thalmor would be kinda cool.
Actually I rather like that idea. Also it would be cool if Bethesda switched the cliche story line alignment and had you play as a Thalmor agent helping to take down the empire for good.
I would also love to see Hammerfell in the next game. We've done so much in the Immortal Blood Timeline with its lore that it's appealed to me more than it ever has before. The wide variety of culture and landscapes would be amazing to see in a game.