We saw the Five Elders after some arcs, so maybe at the end of Wano we will see Im again, maybe even find out what happened to Vivi and Sabo. I highly doubt that we will see Im fight until the very end of the series. I don't know what Im's powers will be, but I presume that they will be very overpowered like most Shonen final villains. Maybe immortality, ability to use all devil fruits, ability to take away devil fruits, etc.

So the straw hat is basically a tin foil hat?

Would really love to see something, even if it's just a couple of pages of him. Also kinda worried that we finally see him make an appearance/fight only to witness the power of his dirt dirt fruit

When will we see Imu again? Theories and discussions on what his abilities/powers might be.