There's the premium outlets in Camarillo, but it would be a bit of a drive from DL, as would the Ontario and PS outlets. The Ontario outlet is more a mix of regular and outlet stores (it's called Ontario Mills if you decide to check it out). I don't think they have a Nike outlet???? I'm not sure though. They have a JCPennys outlet and other little 'outlet' stores. It's not worth the drive though in my opinion. If you are making a day of it and you're really THAT interested in seeing an outlet mall, the Camarillo outlet mall is pretty big. They have a Nike, Adidas, Old Navy, Gap, Levi. All the major outlet stores along with a bunch of smaller ones. If you're a shopper, you could easily spend a whole day there.
-- Also, there is the 'Citadel' outlets just up the 5 from Disney (in the city of Commerce I believe). They have an Old Navy, KB outlet, Big Dog, and I think they have a Vans and Quicksilver outlet as well. It's a REALLY tiny oulet mall though.