Zero Alliance in Darkshore?

It is likely because there is a significantly greater number of Horde active in War Mode at the moment. Essentially your shard is the "leftover Horde" shard.

The system maintains a number of shards which attempt to maintain a degree of faction balance within them. When we have an excess of one faction, those are put into their own shard until more of the other faction arises.

Not ideal, and we're doing what we can to reduce the frequency of that occurrence.