They really need to keep time travel out of it in these films. I think this movie is where we will really see the new series split with the original one and maybe we see the planet of the apes develop differently than what it was in the first film of the original series.
That would be nice, but time travel is an integral part of the Planet of the Apes core story. Evolution and diaspora and the spread of ape culture globally would take at least 1,000 years. Probably more like 2000. So bringing the astronauts back into that time already necessitates time travel of some sort. Probably a vortex or wormhole of some sort. There would be no reason for these astronauts to have been in suspended animation like the first movie series. The book followed the Tim Burton movie very closely, even though it sucked (like the book), and even in that there was time travel.