StudioCanal has released the trailer for Supernova, a new romantic drama starring Stanley Tucci and Colin Firth. The movie marks an on-screen reunion for Tucci and Firth, who previously co-starred in the 2001 TV movie Conspiracy. Now, nearly 20 years later, the two powerhouse actors are coming together to play a middle-aged gay couple who are now facing a serious turning point in a movie that will surely earn them some awards season buzz. The Supernova trailer puts an emphasis on the understated tenderness of the story it's telling. We're introduced to Sam (Firth) and …