OK, last week BBM put up information about this year's 2nd Version set on their website. The set will be released in early August.
Unusually for BBM, they don't actually have a complete count of what's going to be in the set, so I can't say how many cards are going to be in the set. What I do know is that there will be 180 "regular" cards (15 per team), a 12 card subset of "participation players", a 12 card "rookie" subset and a 12 card "veteran" subset (each of these three subsets has one card per team in them), and 12 team checklist cards. There will also be a 1st Version update subset of too be determined size featuring players traded since 1st Version went to press (like Ryuji Miyade), guys who signed more recently (Craig Brazell maybe?) and guys who simply didn't appear in 1st Version (Edgardo Alfonzo?). There's also another undetermined size subset that I think is the first pitch ceremony subset that's been a staple of the 2nd Version set for the last few years.
There will also be insert sets featuring the leading pitcher and leading batter for each team as well as the usual memorabilia/autograph inserts.