9491 Geonosian Cannon
9491 Geonosian Cannon is, like Droid Escape, another minfig-heavy mid-priced set, weighing in at £19.99 in the UK. However this one comes with four unique minifigs, a Geonosian zombie and warrior, Clone Commander Gree and a slighly different version of Barriss Offee, who's sporting one of the new shorter-length capes which can also be found being worn by Lloyd Garmadon in the new Ninjago sets.
Again like Droid Escape, this is a reworking of an old model: a Geonosian cannon appeared in 4478 Geonosian Fighter released in 2003, and this version is much improved on the original. It's much bigger and beefier and looks like it could inflict some serious damage to low-flying craft. Comparing it with reference images at Wookiepedia, the designers have done a good job.
However, the minifigs are the stars of the set. The Geonosians are excellent: they have wings similar to the original Geonosian (sw078) but with the improved head of the one that came in 7959 last year. They carry weapons based on the ray-gun from the collectable minifigs, but they have a large appendage on the front that makes them too heavy for the minifig to hold without toppling over (which is why they are not holding them in the photo above!)
Commander Gree is sporting a standard clone army uniform and helmet but with unique colouring in dark green.
In summary, this is a nice set, but the price will probably put off anyone other than the hard-core Star Wars minifig collector, who will be delighted with the 4 new figures, which I guess will help justify having to spend £20 on it.
Check out the other pictures in my flickr gallery: