It would be great to have pre-defined animations in different design languages like material design so when we are previewing the prototype we can also preview the actual animations that will happen for lets say button. it would be great to enable people to develop such animations and share it with others so they can download a "Material Design Animation Kit", further, develop/modify it or just start using it to bring their design to life.
this will obviously help with more satisfied customers, and developers where they have a common animation design language both beautiful and technologically implementable and standard.