I did yes, because I feel Jock is far more important than Sam or Jaime. Out of all the minor characters, both Alex and Jock can be worked in to some degree.
Jock and Alex are "important" insofar as much as they help JC. Sam and Jaime would likely have helped them much more but, as said, the writers simply "forgot" about them until it was too late, so they don't have nearly as much as an active role as minor characters.
In regards to antagonists, there's only three primaries in the game, and that works out quite well: Bob Page, Walton Simons and Joseph Manderly. Gunther, Anna and Maggie Chow are supporting antagonists. "Minions" of the first three, so to speak.
The main protagonists are JC, Paul and like Morgan Everett in the second Act. Supporting characters are Sam Carter, Stanton Dowd, Nicolette DuClare, Jock, Alex Jacobson, Jaime Reyes and Tracer Tong.
My reasoning is that most of the antagonists are fine, where we get a bit muddled is in the main/supporting cast as there's just too many and most don't get nearly enough screentime in the game. We could expand on their character in a film but I don't feel they all need screentime even then.
Alex and Jock never have to make more than paltry appearances, yet Alex can always be on the comlink and Jock always the pilot. Sam and Jaime are quartermaster and medic and nowhere near as important as the previous two.
Everett is important to the plot, but DuClare is simply a point of communication between JC and Everett and so she doesn't need to have some sort of dedicated screentime devoted to her.
There's no reason we can't include all the characters in a film, but you don't have to have them developed as main characters when most of them clearly aren't. They can make appearances, do their job, then be forgotten about quite easily as "that one minion".
I do need to stress how much I feel that any director making a film on this would likely cut
a lot of plot-based stuff, though, and simply choose one ending to focus on. Depending on what they choose this makes much of the plot a lot more cut and dry.
In any case, Page, Simons, Everett, JC and all the AI would likely make a showing, at the very least, because the entire plot, regardless of what you choose, is revolved heavily around all of them. What supporting characters you decide to use really doesn't matter if the story is remotely similar and they keep it true to the original main cast.
It also should be noted that a Deus Ex film is likely to be more about Human Revolution that the first one any, due to familiarity many people have with DX3 as opposed to us vets and DX1.
http://screenrant.com/deus-ex-movie-update-comic-con/
I can't say I'm too fond of Deus Ex being treated like Blade Runner. Blade Runner's a great cyperpunk film, but Deus Ex isn't Blade Runner, it's a lot more than that. Blade Runner isn't about a conspiracy as it is about AI wanting to be free, and even Human Revolution doesn't deal with that.
Both are, however, similar in that they deal with hugely thematic themes that can be thought-provoking and somewhat existential. What is freedom? What is choice? What is human?
It's really important to understand that what fans want and want directors want are not the same. Most writers want to extend upon the video games world, not recreate it, and that makes sense. Hence many of the characters would act alongside a new cast, not walk in front of them.
Why would I, as a writer, wish to rewrite a story that's already been told? Some might like reboots but I wouldn't, and many directors clearly don't when it comes to video game films.
The point of a video game film for me is to capture the feeling and emotions of the original game. To stay true to the IP of Deus Ex is to have a thought-provoking storyline with deep main characters, lots of questions and very few answers. It's about a dystopian not-too-distant future about high-tech, low-life and conspiracies everywhere.
The entire slogan is Question Everything, Trust No One, and that's the feeling a film needs to inspire, but the plot doesn't need to have that so long as it's at least remotely related to MJ12 or the Illuminati, etc, and makes at least some glancing references to Bob Page, of all persons.
The reason I feel video game movies fail is because they do not tell me things I don't know, they don't expand on the original story if they plan to copy it, they don't feel like the game, and the story and acting tends to just be of sub-par quality.
I, for example, liked Resident Evil but the use of the original characters and the horrible fucking acting in it ruined it for me. Max Payne was another one I didn't mind but felt it strayed far too much away from the original series.
"You either die a lurker, or you live long enough to see yourself become a troll."