Do you mean future or feature domain?
If you got a domain you should „fake“ register a shop with the sw-domain-hash.html and select a shopversion on this none-shop-domain in the account. Than you can download any matching plugins as a zip file. this zip file can be uploaded in any domain.
EDIT
myshopdomain.localhost.whatever.com -> real shop, cant register, but can upload zip
your-spare-domain.nl -> fake shop/domain, register -> download zip