Just a little bit of fun code for diving into.
The "Missing Tiddlers Manager" scans all non-system tiddlers looking for links to missing tiddlers.
It has a button to automagically create all missing tiddlers. (whatever defaults you want for all of those tiddlers, I leave that up to you for your preferences.)
This could be modified fairly easily to define default content for each missing tiddler.
The zip file includes the "Missing Tiddlers Manager" tiddler and the "Sample Tiddler A" tiddler.
Sample Tiddler A has links to missing tiddlers "Sample Tiddler B" and "Sample Tiddler A".