After the death of Thorin in
Nope. Thorin, Fili, and Kili were the male heirs of the first line of Durin, the dominant line. They were the ones in line for the crown and the kingship, in that order. When they died, the first line of Durin was extinguished, but not the line altogether.
In 3019 an army of Easterlings attacked the Lonely Mountain and Dale. Dain died at a great age during that attack, part of the War of the Ring, still fighting as a mighty ax-wielder despite his great age. He perished standing over the body of his friend King Brand (grandson of Bard) before the Gate of Erebor.
After Thorin's death, his cousin Dáin II Ironfoot of the Iron Hills became king of Durin's folk; and when news reached Durin's folk in the Ered Luin that Erebor was retaken, it is believed that most of them moved to the Lonely Mountain. Therefore, Thorin's hall became a sub-realm of Durin's folk.
As in the book, the Arkenstone is given by Bilbo (who, it is revealed, recovered it during his escape from Smaug) to Thranduil and Bard, in order to try to force Thorin to yield a share of the treasure. In the extended edition of the film, it was placed upon Thorin's chest following his death.
There was no sign the Arkenstone had any magical powers, but the size and value of the gemstone itself intensified existing feelings of greed. On top of that, the stone had an immense level of sentimental value for Thorin Oakenshield.
So, Smaug was NOT the last dragon in Middle-earth. However, he was probably (in Tolkien's mind) the last GREAT dragon in Middle-earth.
Though Gimli has no children, he is not the last Dwarf of Middle-earth. After the fall of Sauron, his people continued to thrive in the Lonely Mountain. Gimli made his home in Rohan, in the Glittering Caves of Aglarond, and many of his kinsfolk came with him.
Balin gained respect for Bilbo's abilities, and was the only dwarf who volunteered to accompany Bilbo down the secret passage to Smaug's chamber. Of all the Dwarves in the quest, Balin was the only one known to have visited Bilbo at Bag End after their quest for the Lonely Mountain.
"Erebor", specifically the southern spurs of the Mountain and Dale, is a playable map in The Lord of the Rings: The Battle for Middle-earth II. It has three gates, including the one Tolkien described and two which cannot be closed, to allow those playing as invading forces to easily enter the stronghold.
In Tolkien's history, Azog was beheaded in the battle against the dwarves by Dain Ironfoot, Thorin's cousin. If they wanted a recurring orc villain, they should have used Azog's son, Bolg, who the movies reduce to Azog's lackey and withhold introduction until movie two.
It told how Balin discovered Durin's Axe, and established a small colony, but it was overrun by orcs and Balin was killed by an orc archer in Dimrill Dale. Thus he died in the same place as his father, having been self-proclaimed Lord of Moria for less than five years.
In the Mines of Moria, the Company discovers what has become of them: Balin, Lord of Moria, died in Dimrill Dale when an Orc shot him from behind a stone as he stood looking in the Mirrowmere.
Thorin Oakenshield : [to Bilbo] Farewell, Master Burglar. Go back to your books... and your armchair... plant your trees, watch them grow.
However, Thorin never married nor had any children. The young dwarf king led his people out of Dunland and they finally re-established their home in the Blue Mountains. His younger sister, Dis, later gave birth to two children, Fíli and Kíli.
2022: The Lord of the Rings: The Rings of Power:
Prince Durin IV is portrayed by Owain Arthur as one of the central characters of the series. In the series, he is portrayed as the prince of Khazad-dûm and son of Durin III. In addition, his wife is named Disa.
The Dwarves dug too deep, greedy for mithril, and disturbed a demon of great power: a Balrog, which destroyed their kingdom. By the end of the Third Age, Moria had long been abandoned by the Dwarves, and was a place of evil repute. It was dark, in dangerous disrepair, and in its labyrinths lurked Orcs and the Balrog.
Though someone could start out with good intentions, the Ring would eventually corrupt them. And that is why Gandalf can't touch it. He is afraid that if he did, it would corrupt him and make him just as bad as Sauron since Sauron put so much of himself and his evil into the One Ring.
Although Gimli knew that Moria could be dangerous in the book, he did not know about Balin's death in The Lord of the Rings: The Fellowship of the Ring movie possibly due to slow communication and Dwarves' perception of time.
After the War
Eventually, Legolas came to Ithilien with some of his people, with his father's leave, to live out his remaining time in Middle-earth helping to restore the devastatedforests of that war-ravaged land.
So when she allows this incredible rarity to Gimli, she essentially gives him the three hairs that Feanor demanded of her, because she has looked into his soul and found that he has a good heart and that he desires them for nothing more than to treasure the beautiful days he spent in her lands.
Smaug was the last of the great dragons, thus ridding Sauron of a possible powerful ally. Beyond this, all the rest of the dragons in middle earth supposedly only lived far to the north; being now a lesser race, the logistics of bringing them to bear, particularly in the southern campaigns, would be unlikely.
Smaug was perhaps one of the dragons that infested the Grey Mountains. Details of his origin are unknown, but he apparently was considered still "young" by himself and Gandalf when he first appeared in Middle-earth's history in T.A. 2770, and as having transitioned to become "old and strong" by T.A. 2941.
Smaug sensed Bilbo's presence immediately, even though Bilbo had rendered himself invisible with the One Ring, and accused the Hobbit (correctly) of trying to steal from him.