Thanks to the guys at CBSI for this one.
Out tomorrow, and leading up to Rebirth, is Superman Lois and Clark #8. This book is selling out online and may be snatched up tomorrow.
Update: Superman: Lois and Clark #8 has sold out in TFAW, MYCOMICSHOP, and MIDTOWN. Prices on the book are selling for up to $14.99 currently.
Click the spoiler bar to see the image.
Looks like we get the first peek at a character coming up in rebirth.
Also, keep an eye out on Superman: Lois and Clark #1, the first full John Kent (everyone has been focused on the variant while the regular copies have been easy pick ups.) Also, Convergence Superman #2, birth and first appearance of Jonathan Kent.
Again, thanks to CBSI for the spoiler.