I agree with pretty much everyone here - way too much of the family thing. That in the first Hulk movie - one of the worst movies ever made - the Hulk's father ...do I even need to go into it? Why does Bruce Banner/Hulk need a father anyway? He's a grownup.
Even the Original Series Star Wars did the father-son thing.
Can't a villain not actually know the hero before they encounter each other? In a world of 7 billion people is it really so hard to imagine that the hero wants to save the world from a villain he is not actually related to?
In the Star Trek movie "The Final Frontier" the Vulcan who wants to bring back emotion and who can use Vulcan powers to take away people's emotional pain is Spock's half-brother.
Now, how did that remotely help the plot? It added nothing, not even some interesting scenes between the brothers over who their father favored.
PLUS: let's assume that Spock's father had had another wife that passed away after giving him a son and before he married Spock's mom.
Okay, now, the dynamic would be: father favors first son because he is the first son AND fully-Vulcan.
If anyone, at all, ever in the history of Vulcan, would be a candidate to lead a pro-emotion movement among Vulcans, it would be...the guy who is half-human. Spock. But since Spock, because he is half-human will naturally tend to work hard to maintain his Vulcan composure so as not to be too human, that is not likely. The second most likely person is the guy who married a human woman, Spock's father, in which case it would reverse the polarity and the half-brother that is all-Vulcan would be utterly anti-emotional because the emotional thing would be Spock's thing. Except it can't be as we saw above.
But of all the people on Vulcan - a planet of billions - the least likely person to lead a pro-emotion movement would be Spock's brother because if he did so, he would naturally want Spock on board but Spock would ALWAYS be MORE capable of emotion than he would be by virtue of being half-human.
In other words, just make it any other Vulcan, but NO, it has to be his brother.
Take the original Star Wars films, which I love deeply (there were no prequels period !). Even so, and even though they do a great job with the whole redemption ending, it was not really necessary. This led them to focus on the non-existent prequels as the story of Vader, which was a disastrous choice (instead of the story of Obi-Wan whom everyone still would like to have learned more about but did not, and Yoda too).
But the worst is making Leia his sister. WTF? Why does she need to be his sister and if she is his sister why is she not a Jedi Knight too? Does he have a best friend?
The Indiana Jones film with Sean Connery was okay, I liked it, but Indiana Jones does not need a father either. He is a man, one we all (guys I mean) want to be and one that all the women want to be with, he does not need to please his dad.
Somehow Captain America manages just fine without having an aunt, or a second cousin. IronMan had to have a father though, even if I don't remember him having one in the comics. But okay. Thor has to have one because of Viking mythology, leading to the rule: if you have the hero have family, they have to have had them for at least 1000 years.
At least Sauron is not Gandalf's half-brother, or uncle, and neither is Saruman.