Not necessarily. If you don't import a character into Awakening it is assumed that the Origins Warden was killed fighting the Archdemon, which necessitates sending a Warden from Orlais to Amaranthine to command the forces there. So the Warden Leliana is looking for would be the Orlesian one.Mcoffey said:Now that I think about it, does this mean that the Ultimate Sacrifice ending is just bullshitted away too?
As far as Leliana's own presence goes, there's the sacred ashes argument (mentioned above). There's also another possibility - Wynne will leave/turn on you for the same reasons Leliana does, and as far as we know she can't be killed until the spirit keeping her alive loses its power. If Leliana's only mostly dead, Wynne's spirit may have a couple of tricks up its sleeve it could use to bring her back from the brink.
EDIT: Regarding Flemeth, she gives that amulet to Hawke just after Ostagar, before Lothering is destroyed - which is before Morrigan could have discovered the grimoire in the Circle tower. So she may have suspected Morrigan would try to have the Warden kill her and set up the means of revival in advance.