There is probably a parallel universe where there is a very successful, and good done, movie franchise of the Percy Jackson books. I want to live in that universe.
But think how the movies would end. TLH would end with Jason’s words “Percy has no memory” and then there is a scene of Percy waking up on the middle of nowhere, he is looking around, he doesn’t say a word, you can see a sign that says “Welcome to California”. Credits
SoN would end up a little happier but still it would stress the hell out of you. You have Percy (looking ridiculous on a Toga) walking with Hazel and Frank. He looks at the sky, where you can see the Argo II for the first time, the scene changes to the members of the Argo II, but they don’t focus on anyone…and then there is a shot where you can see the romans from the Argo II, in that same scene you can see Annabeth’s back. Credits (bonus point if you can hear her saying “Seaweed brain.” And then you scream in frustration because there is no reunion.)
Mark of Athena has the worst ending of them all. You have Percy and Annabeth falling to Tartarus and the screen fades to black. Credits. After the main credits you have an extra scene. It’s the Argo II crew in shock and promising to get them back.
House of Hades is the only one who doesn’t end up with a cliffhanger. It ends with the seven on the Argo II, looking ad impressive as they can, sailing for Greece. It’s a powerful shot, it’s the first time the seven are alone on the ship. There is a scene after the credits, it’s Octavian ploting against the greeks.
Blood of Olympus, this movie is one with the biggest changes from the book, Nico and Reyna are not main character and there are a lot of more scenes of the seven, you can see them bonding, you can see them becoming a family, you can see how scared they are of going to fight Gaea, Percy and Annabeth’s PTSD is addressed. There are a lot of scenes of both camps getting ready for war, there are amazing shots of the battle, you cry for the fallen campers. Piper is not with Percy and Annabeth during the “I love you” scene. You can see the greeks reaction of having Percy back, you can feel the grief of the seven after Leo dies, you can see more of the aftermatch of the war, not everything is okay between the greeks and romans but they are on a truce, you get the Sally/Percy reunion. The movie ends with Jason and Piper on the roof of cabin 1 (just like this saga starts with Jason.) There is a scene after the main credits, it’s Leo, he is Ogyia. There is another scene at the end of the credits, You are in Olympus, Apollo is getting punished by Zeus, bright light, The End.