I’ve a feeling Kid and Luffy will awaken in Wano Kuri Arc.
We know Kid is Magneto who knows to use his power it just to a certain point. His devil fruit power manifests in two different abilities, both depicting repulsion and attraction of metals within his vicinity to be used as weapons. The first allows him to repel metallic objects away from himself, such as reflecting a Marine cannonball back towards its shooter. The second ability allows him to draw metallic objects towards him and form them into objects, his most frequent use of this being to form a giant arm made of hundreds of metallic weapons and objects and connecting it to his right hand.
Think of him awakening this power in Wano, where anywhere we look are factories making weapons of steel, iron, you know what I’m talking about.
I can see Kid awakening as a mini magnetar. What is a magnetar? That’s the strongest magnet in the freaking universe. Having it in the upper atmosphere or beyond will start electric storm across the globe and gravity will be messed up.
What I’m saying is, Kid’s Awakening will be really overpowered. Also known by Marvel fans, Eric or Magneto can extract the iron from blood and minerals in the ground as shown in X Men Apocalypse.
I can just imagine the scene of him levitating and guns, beams, bars, spears everything levitating with dark clouds and thunder.
*Theory by manas_with_a_h