I'm of the opinion that you can improve just about anything by adding robots. That includes World War I, and taking it one step further, videogames about World War I in which army miniatures duke it out. Videogames like Signal Studios' Toy Soldiers.
Here's a rockin' trailer for the upcoming add-on dubbed "Invasion." Currently, it has neither a date or price -- but it looks awesome! In fact, I feel oddly compelled to get Toy Soldiers right here and now, thanks to this video. By the time you read this, the download will have finished.
If the previous downloadable content for Toy Soldiers is any indication, this one ought to be set around the five-dollar mark. I can dig it.