Champthrax said:
I am a pretty big aliens nerd (read all the books and source materials), and remember, that a single alien does not necessarily remain single for long. Although there are conflicting accounts, in the absence of a queen, a drone will undergo a "hormone storm" and become a queen. I believe this is actually what the alien in the first movie was doing at the end.
So you actually might end up fighting a queen, or a whole nest, and the queens are actually incredibly intelligent, moreso than the average human.
Also, aliens are not super durable, but their exo skeleton is quite resistant to conventional gunpowder weaponry.
There's nothing conflicting about it, because it isn't canon. Comics, novels, etc. (yes, even the movie adaptation novels since the authors often takes artistic license) don't count. The movies give zero evidence of average drones or warriors "becoming" queens.
I'm assuming you're referring to the deleted scene at the end of Alien in which Ripley comes across a cocooned Dallas? The Xenomorph wasn't becoming a queen, it was constructing a hive. During the making of Alien they hadn't even considered the idea of a Queen (that was James Cameron's doing in Aliens), so they thought that the Xenomorph life cycle involved capturing prey, cocooning them up to a wall, and the captured prey somehow being morphed into a new egg. If you look closely at that scene you can see that Dallas and Brett aren't strung up in front of eggs - their upper torsos are sticking
out of eggs, implying that they've already started changing. This idea was scrapped, the scene was deleted, and ever since Cameron introduced the Queen it was never really brought up again.
In Aliens there is no evidence of a drone or warrior "becoming" a Queen. The director's commentary doesn't imply it either.
In Alien III they specifically state that the Xenomorph inside Ripley is a Queen. In a deleted scene for Alien III they actually introduced a new type of facehugger, often dubbed the "Royal Facehugger" or simply "Giant Facehugger," which is specifically meant to implant a victim with a queen, implying that drones/warriors don't "become" queens, queens are "born" just like any other Xenomorph. This new type of facehugger was supposed to be able to implant multiple victims (which was why both Ripley and the dog were infected - this was supposed to be explained better in the film, but the scene was cut). Still frames of the "Royal Facehugger" can still be found floating around without too much difficulty, and some versions of the DVD/Blu-Ray come with the deleted scenes/stills.
In Alien: Resurrection it was a rather large plot point that the scientists had to resurrect Ripley, because the chestburster inside of her was a Queen which would in turn produce eggs for them to create drones/warriors.
Though I don't consider them canon, the AvP films don't give any evidence of Xenomorphs "becoming" queens when there isn't a queen around. This is a convention that was added in the comics/novels.
Also, your point about conventional gunpowder weaponry... that's actually entirely inaccurate. Aliens is an excellent example. The standard service rifle of the Colonial Marines is the M-41A Pulse Rifle, which fires a US M309 10x24mm caseless round. In real life, 10x25mm Auto has existed since 1984 and has been used in numerous automatic handguns and submachine guns. In fact, at one point the FBI planned to make 10x25mm Auto its primary ammunition, but ditched it due to concerns over recoil. The M-56 Smart Gun fires a 10x28mm caseless round. Then there's the Heckler & Koch VP-70 handgun, which is seen used by Lt. Gorman, Pvt. Frost, and Cpl. Ferro in the film. This handgun exists in real life, manufactured between 1970 and 1989, and it fires 9x19mm Parabellum. Then there's the Smith & Wesson Model 39 which is used by Pvt. Vasquez in the film. It also exists in real life, and also fires a 9x19mm Parabellum round - but unlike the H&K VP-70, the S&W M39 gets an on-screen kill. And last, but most certainly not least, there's Cpl. Hicks' Ithaca Model-37 "Stakeout," a real-life pump-action 12-gauge shotgun, which gets one of the most memorable kills in the entire series of movies. "Eat this!"
Conventional gunpowder weaponry works
just fine outside of non-canon comic books.