The reason The Bella Twins returned to WWE on last night's Raw was because WWE made the decision not to call up  any divas from the developmental system at this time. WWE made contact with several former Divas to return with some turning them down however, The Bellas quickly took up the offer to come back.

Below is a what they had to say on leaving WWE in April of 2012 during an interview with Diva Dirt:

Nikki: "It was actually pretty recent [the decision to leave WWE]. Brie and I just decided that we needed a little bit of a break. When you’ve been on the road for five years, haven’t seen your bed for five days straight, we kind of came to a point like, maybe we can rest our bodies for a little bit. It might not be permanent. You guys might see us soon, you may not. We just knew that we definitely needed to take a break."

Brie: "With any career you’re in, there’s always a life outside of your career and that’s one thing when you’re on the road 300 days of the year, you start missing your family, you miss your friends, you miss all the things you enjoy in life like going to the movies, museums. It’s something that Nikki and I are really looking forward to in the next couple of months. It’s funny, already two weeks gone [since leaving] and it’s crazy how much we miss being at WWE, so you never know [what might happen]. But we’re going to enjoy those things we loved outside of wrestling."