I don't know how likely it is that Wikipedia will do it, but it would certainly be nice to blackout globally and send a broad message that they will fight again

I don't know how likely it is that Wikipedia will do it, but it would certainly be nice to blackout globally and send a broad message that they will fight against any kind of Internet censorship, and that the January 18th blackout is a warning for that. It might help reverse the recent international trend in Internet censorship, too, which is no doubt also coordinated by MPAA and RIAA.