It’s been awhile, so time for a double update. First up is a unusual concept that would’ve extended Star Brigade, the Replicator version of Duke. Apparently, Replicators were to be duplicates of Joes controlled by aliens. They would’ve had a weird alien-bursting-out feature, but this is simply human Duke in the uniform seen in the artwork. (See various Replicators at YoJoe.com)
The second figure is an original character from IDW’s G.I. Joe, Copperback. She was a scientist working for Destro until he killed her father, and she joined Cobra. Later on the Joes freed her to help find Destro. This is an original costume design since she really didn’t have one in the comic.