Almost there
The bass wobble needs to be much more prominent. Add some sort of compression in whatever program you are using. It should be the focal point of a dubstep song. Also, modulate some frequency shifts in the bassline. You can fade it in at a higher frequency, and then drop the frequency when you want it to fully hit. A dubstep bassline needs to sound thick and heavy, which sadly this doesn't.
Dude, do this, and this will be a perfect 10 out of 10 and a completely genre-bending dubstep song to boot.