it is possible that this is the one and only. It could expand and contract, expanding again and continuing this cycle.
Ofcourse there could be another universe, or ours could be like this, that expands to a point where every particle within it rips apart and the universe because an unstable soup of infinity with no laws of physics. In this case it is possible for another universe to be pinched off from the ripping one as a result of the unstable mixing particles matter and unbalanced laws.
So it could be that our Universe was formed from another one, and could hold the possibility to create a second one. Signs show our universe may possibly be a "Big Rip" universe, but it is too early to tell exactly.