Economic students should study the Battle for The Planet of the Apes for a lessen in the law of diminishing returns. This fourth sequel to the Planet of the Apes is a lesson in cashing in, low rent sets, poor acting, nonsensical plot and ignorance of science. This film is as cheap as Superman IV: The Quest for Peace was.
After conquering the oppressive humans in Conquest for the Planet of the Apes, some 30 years before, Caeser tries to keep the peace amongst the humans and apes, albiet with apes in charge.
Gorilla General Aldo views things differently, and tries to cause an ape civil war (of like 200 hundred monkeys). In the meantime, other human survivors learn of the ape city, and decide they want to take back civilization for themselves.
This sets up the most ludicrous battle scene possibly ever filmed in the entire history of bad films. The army from the city rolls up in their 3 motor bikes, a jeep with a canon and a school bus and burns a few monkey tree huts. Sensing victory they interrogate Ceaser who calls the foxing Apes to arms and they actually win the Battle for the Planet!
Cue an Orangtang giving a history lesson to both apes and human children some 600 years in the future! Gasp Ceaser changed the future! Earth did not explode! Chimps and Men can live in harmony!
While the previous for movies had some pretty dodgy paradigms, Battle for the Planet seems to ignore the cannon and comes up with some pretty odd situations. You have to suspend your belief for a bit to accept that in 30 years all Apes and Chimps can talk and can rationalise about space time continuums. You have to accept that a nuclear bomb can destroy a city but that everything below the surface can survive intact and that the electricity still works. You have to accept Caeser can set up an Ape City a day's walk from the city and that the bomb only destroyed the city and nothing else. You have to believe that in 30 years the Gorillas have formed an army ...of 30 Gorrillas.
It also sounds like they cut out a scene which would have given the movie some real relevance to the Ape series, in particular Beneath the Planet of the Apes.
The cut scene was from the end of the film which shows the beginnings of the House of Mendez cult. The humans in the city are about to fire off the doomsday bomb but decide not to, as it would destroy the Earth. Instead they form a religion around the bomb.
Overall, after the brilliance of the first 3 movies, the good effort of the third Battle for the Planet of the Apes is an Epic let down. Do yourself a favour and watch the original Planet of the Apes.