All right, so our All-Canadian DC Comics super team so far includes Plastique and Flying Fox.
The third member would be this big sumbitch: Freight Train.
He is a fairly new character, first appearing in Outsiders #30 (July 2010) in a story in which that team's plane got shot down by Canadian jets (what?). He stuck around until the final issue of the series (#40) and his origin was detailed in #35.
If I understand correctly (I haven't read the above books yet), Freight Train can absorb energy to increase his own strength and mass to superhuman levels. He began as something of an enforcer type but came to side with the Outsiders.
It's interesting to note that he was created by DC Comics co-publisher Dan Didio. Nice to have friends in high places.
A cocky, wisecracking, rogue tough guy; all standard parts of your basic super-team. Bring on the Freight Train!
Next and probably last, our flag-waving leader.