@arturodiaz depends, from the little i know about the universe, you seem to be referring to the theory where the big bang is a repetitive process, that there is an expansion and then contraction of the universe to begin the cycle again. my personal inclination is with the multiverse concept.
the question is actually more simple, and looking at it from a less ambitious angle; the only assumption made is that time was created during the big bang, and did not exist before it. because this view treats ‘time’ as an product of the bang, the possibility of time being malleable seems even more likely.
which leads to, if time is not a ‘fixed’ element (and it can be manipulated- stretched, sped up and slowed down) and we could travel within it, that it means everything that you are about to do, has been done before by you in the future? hence, us having even less freedom than we’d appreciate.
…i hope i didn’t make it more confusing or nonsensical.