I'm holding to the belief that since Bruce is already dead and thus the unofficial rule of 'to be Robin you need to have lost a parent', DC won't feel the need to fridge Talia as well (especially since, y'know, she's only his mother, and that's way less important than his father, right?).
I wonder if Batman dressed them in some special non-disintegrating clothing at some point.
This? Is creepy enough to fit in with canon. Except that I think he'd have had Alfred do it, because I don't think Bruce would stand to look at his parents' corpses.
Other writers adding to Damian's characterization is of the good in my book. Now, if only he wasn't wearing Tim's OYL cape...