system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What is the next step for the Iron Man suit?

Two things I can think of are:

1. A mobile “bank” of more nanobots, to replenish his suit’s store, should he need to. This is a weakness of the Mk. 50, as we know. It can only stretch itself so thin before he becomes exposed and/or loses firepower. This new development could be anything from an orbital “box” that can send a stream down to him and follow him if he does interplanetary. To an “Iron Legion V2.0” that just hangs around to feed into his suit. He might also just have a certain number of nanobot ppm of air hanging around for a few miles’ radius around him in every direction, ready to repair/augment the suit as if the matter “came out of thin air”.

2. Self-sustaining nanotech suit. He instructs some bots hunt around and harvest necessary elements for the suit out of the environment and deliver them to him as needed. as long as he’s in a Earth or earth-like environment, he can never run out of bots.
gpt
OK, just putting it out there that a swarm of Tony's nanobots a few miles wide is an exceptionally powerful and frightening thing.  Controlling a swarm like that he wouldn't need any suit, he could just command his miniature army to disassemble his enemies from the inside.  It's a half step away from the 'grey goo' scenario where nanobots end us all by disassembling everything to make more nanobots.