That's correct, so far. Our Year Four backers funded a paper copy of Disabled People Destroy Science Fiction. That will be produced as a limited edition printed book, and our $35 level is another chance to order additional copies of that book.
Year Four backers also funded the Disabled People Destroy Fantasy special issue, but in ebook format only (that issue will come out during Year 5 as part of the run). We don't have any further plans this year for additional Destroy! anthologies.