I say this...
one. this is pretty cool
two. Alot of skrillex's stuff isnt really dubstep, its a mix between electro glitch and dubstep. If you want to get inspired you have to check out alot more artists that than that.
three. The textbook defenition of dubstep is 140bpm, half tempo beat, deep wobbly bass.
four. You dont have to match that exactly either. skrillex doesnt. just do whatever you think sounds good.
hope this helped
Ah. See, my friends keep saying "LOLOLOLOL SKRILLEX IS THE GAWD OF DUBZTEP LOLOL"...so I generally thought he does dubstep all the time. I apologize for the lack of knowledge. Thanks for the input!