Character Options started with Dr Who and I suppose it's still their flagship line, but they are certainly exploring other options. Most recently released, I've discovered the Construct-A-Bugz.
Some overview info here:
http://newtoybrands.co.uk/construct-a-bugz/construct-a-bugz/
and here:
The bugs themselves are "m'eh" to me, but the buggy little CB characters rock. Gonna need an swarm of them. I suspect the line as a whole may die a quick death, but hopefully they'll release some bug men singles or 5-packs.