Television

This is one of the things I most wanted done right like LOTR was. Right off the bat you saw changes that basically ruined it (looking at both men and women for dragon reborn but then characters are caught off guard by a female using male magic.) and to top it off they really dug into personality and relationship changes with a lot of screen time going through them while many other things were not shown. I personally think 100% is possible unless you mean literally doing the thought overlay like they did in the original dune movies. You don't really have to have all the thoughts if you show what they are doing and you can add a bit of dialogue between characters that is about what they were thinking in some cases (I don't view that as really veering away from source for that type of thing.)