User blog comment:Thisismyrofl/Suggestion: "Your Wiki"/@comment-366087-20140319023742/@comment-366087-20140321225841

Certainly more than one way to do something is always useful, and if you like I'll present my idea in a blog of my own. However, if I may one last chance to example my idea…

So, Special:MyWikis calls up a page in similar format to Special:PrefixIndex only with a list of the user's wikis populating the bottom pane.

Then it could be used in templates. For usage with your goal, something like | so OnYourWiki with parameters of Namespace and Pagename (simplified, will need an #if to make 1-parameter default to Mainspace), so template will call up S:MyWikis with the dropboxes auto-filled. When clicked upon, the user selects from the wiki-list the wiki they wish to see the NewTemp on, clicks, and is taken to Page or CreatePage as appropriate (and permission-appropriate).

But if you still feel this is not exactly what you're thinking of, I'll make my own suggestion blog.