In theroy, yes. But time travel has yet to happen and thus, we dont know. I would assume that that if an alternate universe were NOT created, it would cause a rip in the fabic of time creating a worm hole and allowing all entitys to pass through simultaneously,and that would cause great stress on it, possibly causing it to rip large enough to encase the whole universe and it would implode.
My impression of that question is that you've got enough made-up concepts and buzzwords there to get started on a great science-fiction story. You should pick up from there and write a scene about what time travel does to our universe.
The other answer, written by "Brainlychamp", also has some great techy-sounding phrases, like "rip in the fabric of time", that you could use if he hasn't already copyrighted them.
