The character was sadly killed off on the Season 3 finale, but it's possible we could see more of her and Michonne during flashbacks in Season 4, according to TV Line.
There is “definitely some room to [further explore] the relationship between Michonne and Andrea," says series creator Robert Kirkman.
So is that a yes or a no on Andrea returning?
“It’s always a possibility,” demurs the always-coy Robert.
Laurie agrees that Andrea just might return in flashbacks.
"Anything’s possible," Laurie says to TV Line. "There may be scenes of Andrea and Michonne that the audience wanted to see. You may see more of renegade-Robert-Kirkman-badass-Andrea."
Meanwhile, Laurie admits to being taken aback when she found out that Andrea would die, which she learned just a few days before shooting the finale.
"It was a shock to everyone," Laurie says. "So you roll with it. You show up, you do the best job you can, and you honor the storytelling. Overall, this has been an extraordinary experience, and I just feel so blessed to have been a part of it."
We'll miss you, Andrea!
Source: TV Line, TV Line