Kryptonite extraction with syringe - liquid form of kryptonite for more creative ways to weaken/kill Superman. (Liquid + mod that allows making them gas = gas kryptonite = bombs, traps etc!)

Switchable (and colorable maybe?) trail for flying

Switch on/off for Brainiac tentacles!

POWERS:

Devastating fly for Superman - when enabled, if Superman is moving fast in flying mode, push power activates around him, pushing objects or NPCs away.

Flying for Luthor - Iron man suit system flying could fit in this case.

Hidden blade for Gen Zod - toggeable blade on the hand.