SNK made their first DLC character Silhouette reveal today via an official PlayStation channel trailer. As many players were suspecting, the left-most character was unveiled out to be Whip, who was relatively identifiable from her unique squat posture.
In addition, we now know that the Silhouette characters are 3D renders rather than traditional illustrations a la SNK style, meaning it's quite likely that the remaining character's skins are already done as well.
No release date has been announced for the first DLC character yet, which we might be hearing more about soon when Sony updates their PlayStation blog.
Update: Whip will be available in North America on April 5 for $5.99 according to Atlus USA.