A Nerdy Question on LOTR

[Shaka_Khan]

I'm curious to what Middle Earth would be like after the reign of King Elessar. I heard that JRR Tolkien started on a sequel but changed his mind and didn't finish it. The story would've been a time when there were very few elves in Middle Earth, and the Hobbits were hard to find. Middle Earth still had orcs around but not as many and as threatening as before. What would the sequel be like?
I think one of the important elements to the sequel would be how King Elessar's son's character would be. I know that King Elessar's reign was a time of good life for Middle Earth. King Elessar and Queen Arwen were compassionate people, so I think they would've given their kids a lot of love. They seemed to be wise, so I think they would've educated their kids well. Would their kids become spoiled or kind?