Hmm maybe the other two Death Star could be a threat to Naboo, Mustafar, Uptopia, or even Tatooine.
I guess that's what I was "afraid" of.
Why would the death star be blowing any of these planets (especially Tatoonie) to bits?
If any planet I could could see this happening with it's Naboo.
Now, I'm not saying we couldn't fit a new plot element into this edit to make this idea work...
...because I DO like this idea of more than one death star....but, again, why would we have death stars attacking these specific planets?