Planet of the Apes/WMG

The Remake Took Place In The Past
The was This Troper saw it, is that in order to subvert the expected ending (he was on Earth... IN THE FUTURE!) Marky Mark was still on Earth all along... IN THE PAST!(?) Work with me here... the first (what could be called) human beings showed up about 13000 years ago. Perhaps the apes were here before us. Then, their society collapsed, leaving us to pick up the pieces in time for 10,000 BC. By traveling back in the past, Leo severely altered the chain of evolution. The sudden appearance of their mythical savior provided some sort of catalyst that revolutionized their entire civilization, and continue progressing. Thus, the human race was never given the opportunity to evolve, and most likely died out. Or at least became as primitive as the apes we know today.
 * It is much more logical to assume that it was an Alternate Universe. First and foremost, the technology used by the apes would have been found by later people, and examined. Second, there's the ship, which would have been discovered and led to advancement and hence an unstable time loop. Third, the humans and apes are able to speak modern English, which means that English needed to exist before it existed if your idea were remotely correct. This means that in the time between the plot and the ending, Thade abused the unity of man and ape completely took over.
 * Of course what happened to original cars and stuff isn't explained either, but the movie doesn't offer much in the way of explanation...

In the remake he was on Earth the whole time
It seemed extremely, extremely obvious to this troper but apparently other people don't get it. They tried to do a twist since It Was His Sled but failed. It was the exact same ending however he ended up at least one millennium into the future. Possibly him showing off his technology made others understand it, him bringing the chimp. and letting him stay screwed everything up, or it's just technology advancing.

Gibbons/Siamangs are the butt of jokes to other apes
Gorillas are the military and blue collar workers, Chimps the intellectuals and white collars, and Orangutangs the religious, judiciary and political class. They all live in Ape City. But who is the farmer class that cultivates those maize fields the humans ravage? That's right, the Gibbons. They are small, weak and monogamous to the point of being antisocial. Plus, they run like idiots. They are basically illiterate country bumpkins that live in single pairs attending their own single, isolate farm and land plot, and raising their children themselves to do nothing else. In fact, they usually avoid contact with the cities altogether unless it's time to sell their products or to call the Gorilla army because those pesky humans are ravaging their crops again.

Zaius revealed the truth about Earth's past to Cornelius and Zira at the beginning of Beneath
Alone with them in the beach and inquired about the talking doll, he gave in and told them what he knew about the downfall of humanity and Caesar's... ahem, "Aldo's" rebellion. He also considered that with Taylor gone he had no reason to continue their prosecution and dropped the charges against them. Hence why Zira and Cornelius are free and at home in Beneath, and why they know more about the past in Escape than they did in the original film.

Shortly after the Battle For The Planet Of The Apes' epilogue some sort of religious and cultural revolution took place in Ape society
Shortly after the Battle For The Planet Of The Apes' epilogue some sort of religious and cultural revolution took place in Ape society. The results were humans being cast out and apes considering themselves racially superior. The sacred scrolls were written (or re-written) to justify this at the time and eventually make this historical event largely unknown to wider Ape society with the religious history in its place. This could have been perpetrated by Aldo sympathisers who replaced Caesar's historical revolution and tolerance of humans, with a mythical set of events where Aldo simply said no more to human barbarity. The ability to speak being lost in the wild human can be explained by a mutated gene being introduced by the slightly mutated humans from the city captured by Caesar at the end of "Battle". By the time Zira and Cornelius are allowed to read the secret historical scrolls more than a thousand years has passed and even these supposedly historical records have been tainted with religious and political agendas.