Talking to Witchblade/Red Sonja writer Doug Wagner, it's clear he knows he's working against a template, here. The Top Cow/Dynamite crossover is bucking against decades of "they fight, then they team up" cross-company stories, and he's looking to do something a little different with his leads, pitting them against a common threat across their respective eras without falling into storytelling traps that it would be so easy to write his way into.
Here's the synopsis:
Red Sonja, the She-Devil with a Sword, pursues a cannibalistic monstrosity into the heart of a dead, black mountain. Meanwhile, Sara Pezzini, modern day bearer of the Witchblade and NYPD Detective, investigates the ghastly death of a Catholic Priest. Join Dynamite Entertainment and Top Cow Productions as they bring two of comics most celebrated heroines together in one terrifying tale of loss and redemption.We got a few questions over to Wagner by e-mail recently about the project, working with these two characters, and teaming with artist Cezar Razek to get it told.
For the full article: http://geek-news.mtv.com/2011/12/16/writer-doug-wagner-on-the-deadly-heroines-of-februarys-witchbladered-sonja/