Lucas seemed to like TROOPS, maybe he secretly considers it canon.
It wouldn't be the first time.... remember his response to "CLERKS"? (even if he got the quote wrong, he was clearly influenced by it)
Then again, the Stormtroopers may have tried to put the blame on Scorpion, of Mortal Kombat fame, just as they put the blame for the Jawa deaths on the Sandpeople.
The plot thickens...