Note on the Bella Twins return to WWE
Mar 12, 2013 - by Steve Gerweck
Apparently the decision was recently made not to call up any divas from the developmental system at this time, and thus WWE reached out to a handful of former WWE divas about returning. The Bellas were the first to agree to return. The word is that a few former divas were not interested in returning at this time.
source: Dave Meltzer