I don't read the comics, but I know a bit about it from reading on this Wiki, and from that I know that Abraham is a key character so I know him being introduced inevitable. In my opinion if he is introduced, Daryl will die soon after,  or soon after Daryl's death (I personally don't want Daryl to die).

This is my take on what is going to happen:

The remainder of the group flees the Prison after the Governor's last assault, they end up regrouping at the farm. As the group enters the farmhouse, Abraham picks up his rifle and says "Who the hell are you?"