Dune- Should the third movie directly adapt Dune Messiah? 

Denis could bring forward the no-chamber ship (Deathstar). Even throw in there is not a unguarded vent leading to the core. With the rebel alliance failing to kill Paul. Then include a Godfather ending.

Here's my personal issue: Of course the books are the cannon. However, there were aspects about Messiah I did not like when introduced into the book. Some direct examples: the Tleilaxu and the gholas for one, Jacarutu seems kind out of no-where, and I felt several retconned into being important characters. I would not mind if they got rid of those. However they need to keep the general plot and theme. I'm assuming Chani will fill the role of Jacarutu.

I think it'll make sense for Messiah to stick to its guns and be a gut-punch to anyone who expects to watch an epic holy war, by skipping that. Villeneuve has talked about Messiah being his favorite novel in the series, so I imagine its core message and themes would be something he'd try to preserve. He's also said numerous times he'd want to take a break (by making at least one other movie in-between) before returning to Arrakis, for his mental sanity, having everyone gain other experiences, and even to let the actors age a bit. He's also been insisting on not going into production until he thinks the script is perfect enough. The key to adapting Messiah is to not give in into the profit-hype that would normally bloat the budget and pressure a sequel to be made ASAP. So what they need to do is let Villeneuve cook, make it what it should be, and proportion the budget properly, which can definitely be smaller than for Part Two. Then it can also be a success and not concern itself as much about some audiences recoiling lol

I just finished reading Dune Messiah for the first time and I have no idea how you adapt this book. I loved it but it seems like only a few things really happen, it’s very philosophical. Edric could be cool, but Bijaz is just bizarre and doesn’t fit with the dark universe of Denis’ films. He reminds me of TweedleDee and TweedleDumb. The stoneburner sequence could be cool but there’s no Gurney, no Jessica, no sandworms, and no battles. I trust Denis to make a great movie but anyone hoping he’s sticking to the books is going to be disappointed.

As someone who loves these books down to the core... read them a good 6x times, and I fit the a "dune head" category & my answer is "F*CK NO"! Lol Denis has done amazing with the first two, but he's told a bit of a different story. As you said, books don't always translate well to screen. It's just one of those things that you have to learn to separate. I think what he's done is stay true to the core of the story, but with his own "filmmaking" eye so to speak that transforms the story to fit a film. Also, it's known that Frank made some questionable writing choices that were not always favorable. As for Chani, she is a completely different character (for the better imo) than she is in the books. She was just a romantic character without much agency in the books but Denis managed to turn her into one that you can root for, enjoy more etc... However, as Paul pointed out "She will come around, I've seen it", Denis has already set the seed that she will come around. So basically I think what Denis needs to and likely will do is stick to telling his version of the story, while respecting most of the original. A combination of both essentially.

Great video!

The simple obvious choice is to make two movies... Dune Part 3, where they tell the story of the holy war. That gives you time to put the characters where they are for Dune Messiah.