Hindsight is 20/20, if they don't announce anything, they don't announce anything, but there's rumors about pretty much everything that Sony could announce
Sony announces
250GB/500GB bundles - we knew in advance
PSP2 - we knew in advance
PSP4000 - we knew in advance
PS2 games collection - we knew in advance
PSN - we knew in advance
Qriocity - we knew in advance
Dreamcast games on PSN - we knew in advance
PS2 games on PSN - we knew in advance
PCEngine games on PSN - we knew in advance
Neo geo games on PSN - we knew in advance
Comics on PSN PS3 - we knew in advance
PSN Music store - we knew in advance
PSN App store - we knew in advance
Singstar Dance - we knew in advance
Singstar Michael Jackson - we knew in advance
Resistance 3/Twisted Metal/Syphon Filter 5/Starhawk - we knew in advance
Etc
Etc
I guess you see my point, in this day and age almost everything is leaked, even FFXIII 360 was rumored a few hours before the event.