Or, you know, make it a story where the things that happen only impact the main character and not every hero on that contact list. You're in a "Marvel Universe" now. When you have events that affect the universe, you're begging for questions like that to come up.
If DC ever got around to doing a Justice League movie, I wouldn't expect Batman movies after that to have Bats calling up Superman for help if he's fighting the Joker. But if Batman was in a time crunch and the ramifications would be something like a giant weapon destroying Metropolis (or, on a smaller scale, killing Lois Lane), I'd like to know why Bruce feels like he doesn't need to reach out for assistance or even give Clark the heads up. I feel like that's something that shouldn't need to be inferred by the audience. And if it should be inferred, then it is open for discussion, which is what I'm doing.
Someone brought it up earlier about suspending your disbelief. You don't claim "suspend your disbelief" because a character doesn't think to do something that a logical person might do. Suspending your disbelief is how I accept a normal guy with mechanical wings can fly around a warship and not get hit by any of the bullets. Someone not calling a guy that can help should probably be explained.
Does it ruin the movie? No. Is it a small thing? Yes. I'm not saying "OMG THIS MOVIE IS BULLSHIT" because of a little thing like that, that would be ridiculous. I'm just as done as you are talking about it. But I don't feel like it's invalid to bring it up for discussion.