The wise and ancient Greek aphorism "Know thyself" which was said to hang in the forecourt at the Temple of Apollo at Delphi can apply to many things, even to movies. Movies of a particular genre are best when they adhere to the rules of their own known Universe. A romance should have long gazes and lovers who overcome obstacles. Horror movies should have jump scares. Disaster flicks should feature near misses and heroic self sacrifice. And movies based on comic books should bear the irreverent broad strokes of plot and illustration from which they originate.
Suffice it to say that Thor: Ragnarok understands its pedigree and is abundantly familiar with its own inner workings.
The premise, obvious from the title, is another in the line of adventures featuring Thor, Son of Odin and god of Thunder (Chris Hemsworth). Here he seeks to prevent the foretold, Ragnarok, the fiery destruction of Asgard, his home world.
SPOILER FOR THOSE WHO HAVE NOT SEEN THOR: THE DARK WORLD
Thor’s goal is complicated by Loki (Tom Hiddleson) who is hiding in the guise of Odin.
SPOILER FOR THOSE WHO HAVE NOT SEEN THE THOR: RAGNAROK TRAILERS
Thor is also hindered in his quest by 
Hela, the goddess of death, (Cate Blanchett) and by 
The Grand Master (Jeff Goldblum) who conscripts him into a gladiatorial competition against 
Hulk (Mark Ruiffalo).
This is a movie which THANKFULLY does NOT take itself too seriously. The colors are bright, the tale is full of 
creatures and fighting, 
narrow escapes and changing alliances, 
spaceships, and the most unexpected cameos in the strangest places and characters which are WAAAAY over the top.
Jeff Goldblum’s Grand Master appears often as a hundred story hologram to his city which is imagined as the world’s biggest gameshow.
Hiddleson brings back Loki, the favorite Avenger Universe character one loves to hate in all of his snarky, clever, quipping, never-quite-absolutely-sure-what-he’s-going-to-do-next, ever so fun unpredictability. And every once in a while you get the feeling he is the only sensible adult in a room of idealistic children.
Anthony Hopkins reprises his role as Odin – first, in a comic turn, as Loki pretending to be Odin,
then as the real Odin bringing to bear all of Hopkins’ Odin’s gentle dignity as a king and father.
Cate Blanchett’s Hela sports long dark hair which, when she brushes it back with her hands become enormous imposing deer antlers – a look, (much like Jason Isaacs’ ridiculously tall beaver hat adorning his 
Colonel Tavington in The Patriot), 
which only the likes of a great actor such as herself could sell as frightening.
As a side note, it is interesting to consider that Blanchett also played
Galadriel, another extremely powerful supernatural being – the Queen Mother of the elves in Lord of the Rings who, when offered the Ring by Frodo gave a terrifying vision to Frodo should she accept:
"In the place of a Dark Lord you would have a Queen! Not dark but beautiful and terrible as the Morn! Treacherous as the Seas! Stronger than the foundations of the Earth! All shall love me and despair!"
But who then musters heroic self restraint and refuses ownership of the treacherous Ring.
"I have passed the test. I will diminish, and go into the West, and remain Galadriel. "
Weeeeeeeeeeeeeell just imagine if Galadriel had hungrily embraced the proffered ornament, eagerly put it on her finger, crushed Lord Sauron between her greedy fingers then you would get an idea of Hela – the flip side of Galadriel.
And Blanchett has a Hela-va (think about it) good time munching on this role. She chews scenery, mows down soldiers, blows up castles and mews theatrically about being so very unappreciated in magnificent anti-hero finery. Hela is a worthy counterpoint to
Thor’s beautifully strutting, splendidly self-aware position as the hero of the story.
But the story is not nearly as Wagernian as you might think, as characters, in very human fashion – make mistakes, trip, run into walls and annoy each other.
The screenwriters manage to run right up to that line in the sand between parody and affectionate homage and occasionally even plant one foot on either side. But they keep the ebb and flow between the comedy and genuine tragedy balanced as skillfully as a sword juggler at a PT Barnum circus.
Thor: Ragnarok is exactly what it should be: a live action comic book, brought to a gloriously larger than life by its director Taiha Waititi a New Zealand born child of both Maori and Jewish heritage, who also plays a wry rock monster gladiator named Korg.
Thor: Ragnarok is a perfect example of its kind. Like a two hour Disney ride it leaves you awash in eye-popping breath taking images, gentle humor which makes otherwise grandiose heroes familiar, and a plot which will carry you along like the Kali Rapids River Ride at Disneyworld. Thor: Ragnarok is, at turns, funny, heart-wrenching, heroic, endearing and ridiculous in only the way a comic book hero can come alive.
So grab your popcorn, turn your brain off and let Thor: Ragnarok take you on one of the most entertaining rides of the year. Had they been part of the same mythology, Thor: Ragnarok would have made Apollo proud.