Generally, a hero with a stat line of 2 ATK, 2 THW, 3 HP costs 3 and has a positive ability. In order to be as good as that, Tony here needs to be discounting at least two upgrades, so you'll want both several types of upgrades (since they're all limit 1 per ally) and multiple copies of each (so you can assemble them in a timely fashion). And then you want Call for Aid and/or other allies who are exceptionally good to play upgrades on (e.g. Ronin). And probably something that can restore HP on your huge investments. So this is not a card to throw in any old deck, but it can be good in the specific archetype.

In addition to all the Avenger upgrades, if you go with Star-Lord and/or Honorary Guardian, you get access to all the Guardian upgrades and Guardians of the Galaxy as well. Play an upgrade for 0, immediately draw a replacement card? VALUE!

With the current cardpool this effect is pretty bad. The only Upgrades available in Leadership that can be played on allies are Inspired and Honorary Avenger. Honorary Avenger already costs 0, so you would be putting this card in your deck only for your three copies of Inspired. 2 Atk 2 Thw is great statline, but 4 resources isn't an amazing price. This will make the cut in some decks just because of the statline, not because of the effect.

If any aspect would get access to some great ally upgrades, Leadership is the obvious choice, but until then this card is basically blank.

Thematically, I think this card should have had the AERIAL tag, and it would have helped subtly improve a slightly underpowered card, as decks that are using Air Supremacy would get an extra benefit from this card. I know that you can play Sky Cycle, but it just seems odd that Iron Man, of all people, would need it.