I have been thinking, the spring feasts that Jesus fulfilled were accomplished in consecutive order.
 If the Rapture were at 9/11 this year, that pattern would be broken, however, if another ressurection would occur in 2015 at Rosh hashanna, the pattern would be intact.
 
I am also thinking the second one would be only a ressurection and not a rapture event, thus, the believers who make it thru the Trib. go on to live into the Millenium, while the dead in Christ join the ressurected and raptured believers to rule and reign.