I’ll guess true, based on his name
There have been 3 film adaptations of Lés Miserables
False. Try multiplying that several times.
False. He was born in San Francisco and is of Japanese heritage
Disney is kept frozen in California.
False
Appa and Zuko are the only characters who visibly bleed on Avatar: The Last Airbender
False.
Good! A lot of people actually believe he’s frozen.
Dr. Strange will be the first film in Marvel’s Phase 3
True?
Actually it was true. Although characters are harmed and sometimes shocked by lightning or burned, we only ever see Appa and Zuko’s blood.
Mattel’s NASDAQ title is MAT
Another one I don’t know. True.
False. It will be Ant-Man. Dr. Strange will come later.
Number 13 was the first film Hitchcock completed.
True?
The two part episode Two-Face won an emmy for Batman: The Animated Series
False.
False. It was his first film, but it was never completed.
Hitchcock never filmed nudes.
False
Hot dog buns were invented in 1872
I’ll venture true.
Right you are, but they were very few.
The first Gryffindor password Harry ever knows of is Pig Snout.
False
Kyoshi is an Japanese word
There’s a Japanese writer by that name, but I don’t know if given names count as words in your question. I’ll say true.
Yes, that’s the second one. It’s preceded by Caput Draconis.
Both Christopher Lloyd and Christopher Plummer have played Klingons.
False
There are over 10 Land Before Time sequels
True.
Actually true:
Hitchcock was a silent film director.
True, ocaisonally I presume
Carrie Fisher was Debie Reynold’s daughter
True. I made that same question in this game a while ago! 
Good.
Homer Simpson has a brother
True?
The Original Star Trek Series ran for 3 Seasons.
Very true.
Yep.
She-Hulk is an Avenger.
In some cases
Spiderman is not an Avenger
True.
Uh…Les Miserables is based on a true story.
(Couldn’t think of anything better)