There will be three new recurring characters in season 4 of The Walking Dead that are said to appear alongside Rick’s group and also the Governor.

Those new characters are “Laura, a single mom and ex-nurse who isn’t quite as strong as she first appears; Melody, a ‘just one of the guys’ kinda gal in her 20s; and Don, who sounds like Hershel, if Hershel were crankier and two-legged,” the site reports.
Source: aceshowbiz.com

So the three characters will make appearances in both groups? That is odd to me. Maybe they are members of Woodbury who came to the prison from the season 3 finale, and they’ll leave Rick’s group and meet up with the Governor? What do you think will happen?