Well, no because superglue is only good for two surfaces that sit together and don't get any side to side movement. This would just break straight away.

What I'm thinking, and I know the collectors around me are going to wail and moan, is to put a tiny dob of apoxy resin there. It'll glue together and he won't be able to move his leg much, but it beats having one leg dangling down like a landmine victim. Besides. He needs to be in working order when Martha enters the building. ;-O