No individual seller can sell starwars. It's Disney that has a partnership with Zazzle to sell their characters on Zazzle products in their Disney store. Same with other big brands.
You can on the other hand put your own designs on Zippo lighters, they also have a deal with Zazzle to sell designs on their trademarked Zippos. Zippo does have to review and approve of the design but that's just because they have to reject anything that might "appeal to a child" cause lighters are dangerous.
Hope this helps!
