This was actually made as my half of an art-trade on DeviantArt.
The other artist asked me to either draw Don Karnage capturing Rebecca Cunningham, or draw DK vs DW. Obviously, I chose the latter.
Anyway, I mulled it over for months, having no idea how to make a believable showdown between a sword-bearer and a gas gun-bearer, and last night this idea sprung to mind. I slept on it, then, today, sketched it.
If anything's missing or whatever to make them look off-model, it's because I did it rather hastily in between other things.
Naturally, Don Karnage and Darkwing Duck belong to Disney (not me, unfortunately).