did gollum kill frodo parents

No, Joker wasn't the one who killed Batman's parents. The culprit was a common criminal during a mugging incident. However, Joker has often taunted and tormented Batman about this tragic event in their confrontations.

Yes, in many comic storylines, the Joker is responsible for the death of Bruce Wayne's parents.

Yes, he did. It was a significant plot point in the comics.

In most mainstream comic continuities, the Joker didn't kill Batman's parents. It was a random act of crime by ordinary criminals. But there might be alternate or non-canon versions where this could be different.

Yes, Bucky did kill Tony's parents in the comics.

Yes, in some comic storylines, the Joker is responsible for the death of Bruce Wayne's parents.

Yes, Bucky did kill Tony Stark's parents in the comics.

Yes, the Winter Soldier was responsible for the deaths of Tony Stark's parents in the comics.

There could be various reasons. Maybe he had mental health problems, or there was a major conflict within the family that pushed him over the edge. Whether it's true or not, it's a disturbing thought.

There could be characters like Frodo. Since the story is related to the Lord of the Rings universe, Frodo, who also has a connection with the One Ring, might be relevant. And perhaps Aragorn, as he is an important figure in Middle - earth and his actions could cross paths with Gollum's in some way.