As I've mentioned in the past, it's given me an insight into the "fanfic" impulse. While most of it's just fun, I've found that the wholesale rewrite of 70 years of comic book history makes a good springboard for analysis of the original source material. Those interested in comic books, gaming, and fanfic might find it amusing; I'd rather enjoy getting some discussion going about timelines, characters, and story decisions, both in my game setting and the original "canon".
Unfortunately, since I also plan to use the journal to communicate information to my (only) player, I need to friends-lock posts that might reveal key story elements (including the two most recent ones). If you want to read the Sooper Seekrit Spoilers, please drop a comment in the introduction post, so I can add you!