Based on the Marvel Previews #8, March for May 2013, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core Titles
Avenging Spider-Man #20
Avenging Spider-Man #21
Marvel Universe Ultimate Spider-Man #14
Scarlet Spider #17
Superior Spider-Man #9
Superior Spider-Man #9, variant Ryan Stegman
Superior Spider-Man #10
Ultimate Spider-Man #23
Guest Apps
Avengers #12
Avengers #12, 50th Anniversary variant
Spin-Offs
Alpha: Big Time #4
Venom #35
Reprints
Marvel Noir: Spider-Man / Punisher TPB
Marvel Universe Wolverine Digest TPB
Spider-Man 2099 Vol. 1 (new printing) TPB
Superior Spider-Man Vol. 1: My Own Worst Enemy TPB
Wolverine: First Cuts TPB