Scabbers bites Goyle

[jrober4211]

No: HPFGUIDX 31043

This is my first post. I hope I am not being redundant, but I 
searched and only found a couple of entries regarding this topic in 
the archives. I have a question for those that are more detail 
oriented than I am. Who believes that Wormtail/Pettigrew/Scabbers
will play a significant part in the downfall of Voldemort in future 
books? Other than the obvious reference of Dumbledore's regarding 
Harry showing mercy to Pettigrew in the shrieking shack, why would 
Scabbers bite Goyle on the train when he obviously knew Goyle either 
was a Deatheater or his father was? Does anyone know any other 
examples of foreshadowing of Scabbers/Pettigrew/Wormtail redemption 
in the books?