Considering all the foreshadowing that goes on in Restless, (some of it, such as in Buffy’s dream, quite deliberate), I always found it curious that Spike does not appear and is not referenced at all in Buffy’s future. By this time Mutant Enemy was definitely considering a Spuffy storyline for S5. I thought I’d take a crack at puzzling some things out about it.
Wondering about the answer made me realize something else. Spike couldn’t have been in Buffy’s dream because it would have detracted from the theme. ( Each dream represented the weaknesses/fears of that character )