Yes, and so is The Avengers. After two viewings I'm perfectly comfortable saying so and I will stand by it. It's up there with those two in terms of how much fun I had at the movies, and will be considered an all-time great in the future, guaranteed.
Two viewings here, and I have no qualms at all saying that I had the absolute, number-one-with-a-bullet
most fun at the theater with this movie. I benefited from two surprisingly (especially on late sunday) outstanding, respectful crowds that came to have a good time with like-minded people.
My mind boggled at how many times I got caught up in the cheers and applause of the big crowd-pleasing moments seeing it a second time, even knowing that they were coming. And the Thanos goosebumps recurred, too. Just all-out, crazy-enormous buckets of big-budget
fun.
I remember how I felt walking of of The Dark Knight. I was generally very quiet, in awe of what I had just seen, and voicing my support for Heath Ledger to get an Academy Award for his absolutely chilling performance. That film actually made me think about some philosophical issues in adult terms and consider what the impact of a vigilante might be on the scale of Batman in real life. But you can bet I did not have nearly as much
fun in the theater- it's just a completely different tone start to finish.
That said, in terms of overall quality I don't know where exactly I'd put it compared to those two mentioned. It's certainly in the running but I won't deny I should wait for the afterglow to fade before considering all-time status. I really, really enjoyed it.
One thing that did not work was the "new" Iron Man prototype suit which looked exactly like the old suit and didn't appear to be any more capable...
Yeah, it had new leg-boosters and he can don it without any external equipment (even in midair), but this was a missed opportunity. Perhaps a deleted scene.