The movie was horrible and predictable, it was a waste of time to see it really. Like wow, some creatures from future can create a supermassive black hole to save themselves in past, but since they exist, there was no need to save them in the past, but the story is so touching nobody will even care.
Not to mention the ship would have been torn apart by the gravity before entering the event horizon, or the time required to reach the black hole would have beem enough to let all humanity go extict, since time is relative and the higher the speed is, the slower the time is for you.
A total fail of a movie if you ask me. Strings theory for the common folk.