You clould have something like gohans shield thing but instead have rocks and dust/dirt flying around you, instead of the color of the regular shield it would be clear with just the rocks and dirt, but that can be for anyone who transforms and to make more realistic for ssj2 it gets bigger with bigger rocks ,
When I say rock im talking about when you power up/ charge , the little rocks fly up,
For the dirt/dust that also comes when you are charging or powering up,
If you were over water it could make waves going around in circles instead of the little ripples,
Those are just some discriptions of how I think you could make the shield look for a transformation and I know you were thinking something more like wind and the dust flying around gives it that effect, so anyone want to tell me what you think?