SUGGESTION

Film a 15 minute side story about two wampas that meet and fall in love and have children. But when the Rebel alliance lands on the planet, the ships accidentally cause ice fragments to impale and kill the little ones, and now we have a better understanding for the motive for them attacking Luke on the Taun-Taun and for why they always seem so angry.

Finally, when the last Rebel ship (the Falcon?) leaves Hoth… show the mom and dad, looking up at the sky with a single tear falling from their eye.