Of course, it is possible, but what happens if they travel to the homeworld and it is dead and cannot support life any longer? Wendy would not have mentioned so many times that the world was dying if that would not come into play in a future arc. The phrase "You can never go home again" is just nagging at me in the back of my head in regards to this. My speculation: The elves that decide to leave Abode and travel to the homeworld will find it dead and barren. There is the possibility that they will encounter other 'shells' and all decide to return back to Abode with Skywise, Timmain, and the rest of our beloved elves. Of course, there is no telling how long it will take for them to return. I think that they will travel back to the world their race came from, but it will not be the nice and tidy happy ending.