The Iron Man mod has long been a stable of GTA. I remember the famous one for Grand Theft Auto IV being a ton of fun so the prospect of it being done right in V is pretty enticing.
And someone has finally made it a reality. Modder JulioNIB brings the character to the fictional Los Angeles to run riot, terrorizing the police, citizens and helicopters all the same. If you'd like to practice playing as Iron Man gone rogue, head over here and follow the instructions.
Here is a video of it in action. It looks like a seriously good time.
Thanks to VG247 for the heads up.