doubleofive said:

These are all coming from the same source, well, lack of source. At this point, I won't believe anything that doesn't come directly from StarWars.com.

A very reliable source named KenralyShadow told me that in the new 4K-sourced SuperSpecial Editions, Luke's hand will be shown falling out of Cloud City and landing on a passing freighter which then carries it into space. Later, when Vader loses his hand, it will fall past the DSII reactor, land on the Falcon as it passes through, and be carried away from the explosion safely. When Lando takes the Falcon in towards the Forest Moon, the hand will fall off and drift away into space. After the dancing celebration, we'll see Vader's hand bump into Luke's hand. The two hands clasp and float away into the void, which is right where we'll find them when SW7 opens.

At least the final shot of ROTJ won't be the happy clappy group photo anymore!