Marvel Studios sticks the landing with “Avengers: Endgame,” a completely satisfying conclusion to the nearly two dozen films, bringing together the stories of a wide range of characters with complex, varied mythologies extending back over decades of stories in comics and other media.

We need to all take a moment to pay tribute to Kevin Feige of Marvel Studios, who has produced them all with a deep understanding of the characters and the fans and a truly remarkable ability to find a nuanced balance between canon and innovation. His willingness to let the individual stories of the characters develop in such different genres and still bring them together when it is time for the Avengers to assemble is an essential element of the success of the series. It would be like having separate film series for Harry Potter, Hermione, Ron, Draco, Professor McGonagall, and Dumbledore, one a romantic comedy, one a thriller, one a crime drama, one a political allegory, and then brought them all together every so often to continue the core story.

I am going to do my best to continue this review without spoilers, but there is one I am sure no one will mind. You do NOT need to stay through the very end as there are no extra scenes following the credits. That seems right for a movie that is such a resounding conclusion and I know you will be happy to get those ten minutes of your life back instead of sitting through the names of the personal chefs of the stars. Now, if you want to see it without knowing anything more than whether I liked it, let me just say here that I thought it was great and you can come back and read the rest after you’ve watched it and want to let me know what you think.

To answer the most frequently asked question: no, three hours does not seem long. It’s really three movies in one, and — fair warning — I could feel my objective critical faculties dissolving after about forty minutes when I realized that it was combining three of my very favorite movie genres in one. First is Marvel superhero stories, of course, with great effects and action, both one-on-one (and I really mean ONE) and big, BIG, battles. Then there’s getting the band back together, with a group of people who once worked together very closely but were not always in agreement (the “Civil War” debate comes back) seek each other out and try to form a team again. And then a heist, or rather, several heists, as the Avengers’ favorite McGuffin is very much a part of the story. There’s a fourth major theme as well, but that’s something I will not spoil except to say that even though they make delightful fun of the way that theme has been portrayed in many other movies, I strongly advise you not to think too deeply about whether the way it is portrayed in this one does any better in terms of consistency or logic.

To answer the second most frequently asked question: yes, you have to have seen the previous movie and as many in the series as possible to get the most out of it. This movie was made by fans for fans and there is tremendous depth that shows how thoroughly this world has been studied and imagined (though only one of the very knowledgable group I spoke to following the film could identify a briefly glimpsed teenage boy toward the end). To confirm the most frequent speculations of those anticipating the film, yes, we will be saying goodbye to some characters, every one of them in a supremely satisfying way, but bring a handkerchief. Yes, we will see some we thought were lost back again, sometimes in a flashback. One of the elements I loved most in this film was those flashbacks, which might give us a different look at scenes we thought we knew.

And the answer to a question that maybe fans forgot to ask, after all these movies: Yes, someone does say, “Avengers, assemble!” I admit it, my heart skipped a beat. It also thumped pretty hard several times and I cried more than once. The skill it takes to fight with Thanos is nothing compared to the skill it took to bring this series to such vibrant, thrilling life, and I am grateful to Stan Lee (yes, he gets a great cameo), Jack Kirby, Steve Ditko, Kevin Feige, Disney, the Russos, and especially to each of these actors, who bring their A game every time, for assembling this joyous finale.

Parents should know that this film includes extended sci-fi/comic book peril, action, and violence with monsters, battle scenes, explosions, very sad deaths including death of a parent and fatal sacrifices and a handful of bad words, including one said by a child.

Family discussion: Did Cap make the right choice? What did the characters learn from their past experiences? Which Avenger is your favorite?

If you like this try: the other Marvel movies, especially “Black Panther,” “Iron Man,” “Ant-Man and the Wasp,” and “Avengers: Infinity War”