Automatically open a file with periodically changing filename

[NaOH]

This prior thread has a solution whereby you create an alias to the file and point Keyboard Maestro at the alias.

Open Document Action: Pointing to Alias

Hi, I'd like to create a macro that will open a document, and that document will change each week. My hope was to point to an alias and then update the alias each week. But it doesn't look like I can point to a symlink -- resolves into the underlying doc. Is there another way to achieve this dynamic reference?