Okay, let him/her be but... no more Hawke in DA3! We want our GW back! She/he can be dead? Ah, it never stops BioWare! Anders, Lelianna could be dead too but they're alive. A miracle, hah?
And now Hawke is A Chosen One. Cheap idea, BioWare, cheap! Hawke'll never replace GW, he's not good enough