Movies always make things differently towards characters, and when they do, they change things in the most horrible way. There was no need for his spear to be living. Especially in the second movie, now that was just incredibly stupid to watch when Scorpion came into the scene.
No, they just need to stay with what Scorpion has with the spear as in the picture shows. There is no need to make it a living creature coming out of his hand, not to mention, why would he have a living creature inside of him anyways? That makes no sense either.
i kind of like the idea of scorpions spear coming form his hand. I like to think that the that was the weapon that he used most often when he was alive and now that hes dead that weapon has become a part of him since it was his weapon of chioce.