There might be a way to travel faster than speed of light contained in dark matter, but we just don't know it yet.
Talking about FTL, many answers might be found just looking at ordinary matter, which keeps on surprising us.
For example, i find very intriguing the quantum entanglement, a phenomenon that has no actual explanation at the moment, which, however, opens the door to many theories that would otherwise belong to the science-fiction universe. That gives us the hope, if not the certainty, that some sort of FTL data transfer may be possible.
Personally, i find this much more exciting than the amount of solar masses of a black hole!