Yeah, canonically they all survive and are a group. You see them in endings and whatnot. As for Krieg, IIRC in his reveal trailer he gets knocked off the outside of the train like a derp. Gaige just kind of arrives on her own. --- "I'd rather betray the world than let the world betray me." -Cao Cao
They are all alive, and the game pretends that they're all traveling together all the time. Various cutscenes and audio tracks allude to this. --- GT: Ellipsis415 Playing: CoD: G, GTA V, Borderlands 2.