In one of the Shatnerverse novels there's a convention of people who have travelled through time. How long before people who were once dead are numerous enough to have one as well?
"I remember once when I died..."
"Hey, I've been dead before too!"
"Wow, small world. We should have a convention sometime. Swap stories with other former deaders"
Would the SCE story Wildfire have the same emotional impact that it did of we knew that Kieran Duffy would be returning? Good thing for the story that while he was a canon character he was also a minor one.