Hawking had previously considered the idea that the information branches off into parallel universes. Hawking had this to say about his recent thinking:
“There is no baby universe branching off, as I once thought. The information remains firmly in our universe.”
“I'm sorry to disappoint science-fiction fans, but if information is preserved, there is no possibility of using black holes to travel to other universes. If you jump into a black hole, your mass energy will be returned to our universe, but in a mangled form, which contains the information about what you were like, but in an unrecognizable state.
“It is great to solve a problem that has been troubling me for nearly 30 years, even though the answer is less exciting than the alternative I suggested.”
Time will tell if Hawking is correct and I'm sure a number of cosmologists, like Lee Smolin, will have lots to say on the issue.