um dude, how long do you think these movies are going to be? 20 books in 3 hours? 20 minutes for the first book? With a script, a page translates to a minute on screen, you are talking about a 2000 page script per movie, and even if you dont include everything in every book, and you skip books, and cut corners, you can maybe cut that down to 500 pages lol
Okay heres what I would do:
1. The first movie would take the Invasion and mix in a classic yeerk plot for them to foil. It would be nice if it could be an origional plot, but for arguments sake lets say its the kandrona at the EGS tower. While in the yeerk pool, Tobias overhears about where they are keeping it while he is being trapped in morph. Then the movie ends with them destroying it.
2. The second movie would mix the message and the predator. This is the only one that would worry me about feeling tacked on. We could have them get captured trying to escape the sea with Ax, but that would be a little too long in the same mission. I think it would be better to have them get ax, and then they go straight to helping him get home and get captured and brought to V1. So technically it would be 4 and 5 just pasted together, but i dont think it would feel that way, i think it would flow nicely. We could also add the theme of ax not trusting the team and then end it with him telling them about seerows kindness.
3. The third movie is where Tobias gets his morphing powers back. For this we should mix #7 and #13, while tobias is dealing with the bird thing, rachel finds out her dad is moving and she could leave the fight. A random battle leads them to the yeerk pool where the ellimist comes to them and helps them escape, in the chaos two hork bajir escape. As the ellimist comes to tobias telling him to save these two, he also comes to rachel and shows her the future, which allows her to learn the location of the valley, the perfect place for the hork bajir.
4. This movie will introduce Erek and the Chee. While the Android has enough story to support a movie, it wouldnt be long enough, so a side plot such as jake being infested or rachel getting an allergy can be used to add depth and length to the story.
5. The David Trilogy. Nuff said.
As I've said in other threads, these movies arent working to an end, and these five movies are only the tip of the iceberg. A little creativity can adapt almost any of the other books to make another 10 movies. This isnt how it should be done, or how it has to be done, this is how i think it should be done and would like to see it done.