This is a nitpick of mine, but I need some clarification. In Dragon Age 2, you are allowed to import your Warden's story from the first game, or choose from 3 presets. However, it is still possible for your Warden to die killing the Archdemon, becoming a martyr.
Now onto the question about DA2's ending.
Now onto the question about DA2's ending.
If your Warden died, does Leliana still mention him/her as if she disappeared like the Champion?