I found it curious John Aman immediately started killing the other Immortal Weapons once he learned Iron Fist was investigating the Concordance Engines. He didn't start in with that back when Orson Randall was after them. Sure, Orson wasn't on best terms with the other Immortal Weapons, not after he refused to participate in the Tournament of the Heavens and ran off with the Book of the Iron Fist, but he found other allies. Which ought to have clued Aman in that things weren't always going to be that obvious.
Even setting aside Orson's past history, why would Aman assume Danny would go to the other Immortal Weapons? He's known them for a relatively short time. Meanwhile, he's an Avengers, he and Luke Cage, Misty, and Colleen have been friends for years. If he's in a pinch, where do you really think he's gonna go to first? And that's assuming he's the one spearheading the search, which doesn't seem accurate. Danny is funding it certainly, but I think Strange is the one leading the search, as arcane mystic stuff is more his alley.
It feels like Faction just wanted to kill off the other Weapons for some reason. Except for Fat Cobra, who is clearly the breakout star of the bunch. It's a bit of a waste. I liked most of the other Weapons, Bride of Nine Spiders, especially, just because she was kind of odd and hard to decipher. Sure, there'll be a new Weapon for each city eventually, because that's how it works, but they won't be the same people. Which could be interesting, if someone takes the time to have Danny get to know them. Will they hold it against Danny that Aman killed their predecessors because he thought they were working together? Would they regard him more highly because he was able to face Aman and live?
For that matter, what's going to happen to the Green Mist of Death? Orson Randall was hunted because he killed one Immortal Weapon. Aman just killed 3, and took a run at 2 others. There has to be some sort of punishment for that, surely.