Okay, so here's my theory of the theory of the defense, and what sooper seekrit info I think Baez is after.
The recently filed motion from KC's attorney for the Z defamation case indicates to me that in the murder trial, Baez will stick with the Z kidnapping story. Because of the bits and pieces of disparagement of certain friends, I believe the aha! Baez has planned is to expand the Z kidnapping story into a bigger conspiracy of kidnapping and murder wherein Z and the friend(s) worked in cahoots.
Based on my theory of the theory of defense, I'm speculating that the sooper seekrit information Baez is seeking is call records, ping records and/or text records (or possibly work records or computer records) from Jesse, Amy, Tony, and/or Ricardo. Records that are not available from the SA/LE that will place one or more of the friends either a) somewhere near KC/Caylee on June 16, or b) somewhere near the spot where Caylee's remains were found (so that Baez can say they dumped Caylee's body there).
To further support my theory of the theory of the defense, I offer Amy's delay of her deposition and hiring of an attorney. I'm speculating that Amy has gotten wind of what's in store. Baez asks her to bring such-and-such records with her to the deposition. Amy says "Huh? Waddya want them for?" Baez, whistling, says "Oooohhhh.... nuthin'...." (and mistakenly smirks). Amy thinks about it, cancels the deposition, hires an attorney, and Baez then requests the sex partay. Oops!!! I meant the ex-parte!!!!
All idle speculation and MOO but ya know, it kinda makes sense in a backwards kinda way...