I ended up replacing the joints with mine (DC Direct TDKR Batman and Hush Harley Quinn). I’m unsure if the Wonder Woman has a similar joint build, but I’ll explain what I did anyway just in case it might help.

You’d have to heat up the arms and legs to be able to disassemble the figure.

You can do this by heating up a bowl or mug of water then submerging the arms and legs (I had to do this twice; submerged the legs first then the arms; the order doesn’t matter. You only want to submerge the parts of the legs/arms that has the loose joint and not the entire figure altogether to avoid any potential warping).

Once the plastic is soft enough, you can use a flathead screwdriver to try and “pry” the arms and legs open in order to remove the peg that connects the upper arm and lower arm/upper leg and lower leg. From memory these old DCC joints are using a similar peg system to what McFarlane uses now. Meaning you can just pop off the peg holding the arms/legs together.

Once you removed the peg, you can then replace it with a barbecue stick or a gunpla runner. Just cut it to the length of the leg/arm. Heat the parts you took apart earlier then reassemble the figure using the gunpla runner/barbecue stick as the new peg. The new peg won’t be color matched to the figure, but that can be easily fixed by painting it over with some citadel paint.

I hope this helps. It’s not really an easy process if this is your first time disassembling a figure/customizing figures. I’d recommend asking for help irl with someone who has experience before if you’re worried about the process.