Best MCU Phase One Movie?

It's either Iron Man or The Avengers, although I prefer the latter.

Avengers.

Avengers, then Iron Man.

The Avengers

Iron man holds up a lot better now than avengers. Avengers was probably cooler at the time though.

Iron Man

The Avengers, Iron Man coming as close second.

I think the avengers.

Avengers and IM

The Avengers, then Thor, then Iron Man

Iron Man is maybe the best superhero movie Marvel Studios has ever done. The only true adversary would be Captain America: The Winter Soldier.

Iron Man easily

Iron Man 1

The first avengers then Iron Man.

Avengers, then Iron Man.

The Avengers was an Epic Experience to see as a Comic Book Fan. Iron Man was a Great Film but we had seen Great Superhero Films Before starring a Single Superhero with an Origin Story. Avengers was Something New and Groundbreaking IMO.

Iron Man

The Avengers.

They're all equally mediocre, in hindsight.

For me, Iron Man

I'll throw in an honorable mention to Norton's Hulk film

I'd simply rank them like this:

1. Iron Man
2. The Avengers
3. Captain America: The First Avenger
4. The Incredible Hulk
5. Iron Man 2
6. Thor

1. Captain America: The First Avenger
2. The Avengers
3. Iron Man
4. The Incredible Hulk / Thor
5. Iron Man 2

Iron man 1 and avengers

Avengers, Iron Man, Thor, Captain America, Iron Man 2, Hulk.

Iron man

The Avengers.