You forgot

7.  Soylent Green.  I think that it is spot on (with the possible exception of Soylent itself).  No energy, destroyed ecosystem, masses of people, global warming, and a very few wealthy people living in luxury.

attn Duncank
yes , that is where i got this name ....
was using it long before i gound out about PO . but it does seem to fit the situation in a way .  im a country boy , in a fairly survivable spot . small town with less than 10k people , 60 plus acres thats a had a garden for 130 years nonstop in my family , pretty much raised in the field and stream ....congrats to you , your the first one here to catch that ..
Yes, Soylent Green at number 7)

Number Eight?

8) THE HANDMAIDS TALE: Theocratic , fascist, dystopia with complete subjugation of Women.

Just need anothe two and we have the top ten hits for 2020.

Chronologically, several of the following could occur, in sequence:

#6) Three Days of the Condor - Some could argue that we have already entered this period. Puts off the inevitable.

#7) Soylent Green - The decline begins in earnest, government unable to cope, corporations step in. War, famine, and pestilence stalk the land. 10 years from now.

#5) Shogun - Modern civilization starts to crumble, stabilizing in a neo-feudal system, similar to that seen in third world countries today. Somalia or Zimbabwe seem apt models. 25 years from now.

#3) Mad Max - Effectively, the end game. Only vestiges of modernity remain, fossil fuel energy sources mostly exhausted. 50 years from now.

On the movie theme, how about 'THE POSTMAN'

Modern civ destroyed itself, those who survived found different ways to make a living:

some making it by living as 200 years ago, farming, fishing, community
some making by maintaining some modern era tech, hydroelectric, computers
some find themselves subject to warlords, raping, pilaging, burning, taking

Tony