Xenomorph nightmare fuel

So far, we've seen a facehugger impregnate humans, a dog, a Predator, and a Trilobite (Huggoth) impregnate an Engineer. The way the dog came out makes me wonder what other animals could be ALIEN-ified. And then it hit me - what would happen if a facehugger or even the Trilobite from Prometheus got it's legs or tentacles on an elephant. Would it look similar to the bio-suit the Engineers wear that we first see in ALIEN? Would it be humongous? And just think of a queen from that melding? 40 or 50 feet tall?