I think Snow drifting in and out of consciousness is the way things will go. Ginny Goodwin is currently heavily pregnant, so it would make it a lot easier on her to play an expectant mother on bed-rest than for her to be up and about doing action scenes alongside Josh Dallas. This way, Snow gets to have some some realistic drama from a hospital bed without being totally written out of the plot.
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"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy