Actually, it does. The Court tends to share the love when it comes to assigning opinions. If Scalia weren’t writing Heller, he most likely would have been given ANOTHER case from that sitting to write, because that’s just the way the Court (whether the CJ or the senior justice if CJ is not in the majority) does things. That’s just the way it goes.
Unless you know more than the folk who write the SCOTUSblog, it hardly seems to be fantasy. To quote them:
"It does look exceptionally likely that Justice Scalia is writing the principal opinion for the Court in Heller the D.C. guns case. That is the only opinion remaining from the sitting and he is the only member of the Court not to have written a majority opinion from the sitting. There is no indication that he lost a majority from March. His only dissent from the sitting is for two Justices in Indiana v. Edwards. So, thats a good sign for advocates of a strong individual rights conception of the Second Amendment and a bad sign for D.C."
I’m sorry, what I meant to say from my previous post is that it looks like they may not be guaranteed to write a majority opinion but it looks like the way the blogger writes is that usually every judge gets to write one majority and one minority opinion per sitting. While not bound by law, perhaps that is how it usually works.