engine air intake

My 2004 EX Element with 244,xxx miles started having this issue yesterday. I parked at a park (and shut the car off and got out to walk around..) and made a call, and went back to start my car and this happened: It didn't start, as if I had only turned the key to accessory, which I don't think...

I was replacing my air filter and I noticed the engine air intake wasn't connected. The unit was pretty gunked up and gross inside, should I replace it? I remember having the air filter replaced a while back when I was getting my oil changed on a road trip and I assume the engine air intake was...