I am not sure how everyone gets through AK so fast. I say a full day to 1 1/2 days.
I agree wholeheartedly. That being said, here is a 'plan' that will get you to most things if you ONLY have one day to be in Animal Kingdom. You'll have to run around and you will certainly miss some of the subtlety and enjoyment that is Animal Kingdom. The one thing you really have going for you is visiting at a very low crowd time of year.
8am - Get FPs for Expedition Everest at park opening and immediately book to...
8:15 - Kilimanjaro Safari
8:45 - Maharaja Jungle Trek (could last an hour, but could be 'seen' in 30 minutes)
9:15 - Back to Everest to use FP
9:45 - Walk to Dinoland and do Dinosaur (that time of year/time of day should have short wait)
10:30 - in line for Finding Nemo: The Musical
11am - Finding Nemo
11:45 - Triceratops Spin and Primeval Whirl (again, lines shouldn't be too bad that time of year)
12:30 - lunchtime, Restaurantosaurus is the easiest, but Flame Tree is nearby also
1:15 - It's Tough to Be a Bug
2pm - Flights of Wonder - you may not get a great seat, but you could squeeze in right at 2pm
2:30 - If it is warm enough, this is the time to do Kali River Rapids
3pm - Train to Rafiki's Planet Watch and Conservation Station
3:45 - Train back to Pangani Forest Trail (again could last an hour, but could be 30 minutes)
4:15 - Walk to Camp Minnie Mickey for...
4:30 - Festival of the Lion King Show
4:55 - As you are being herded out of the park, check out what you can of the Discovery Island Trails
You miss the parade (as a huge Parade of the Art-imals fan, the current parade just depresses me) and no time to visit characters, but you hit the 'attractions.'
Do I recommend it, NO. Is it possible, I suppose so, but it will be a hectic day. If you have the chance, allow for another half day and spread that stuff out!! I'm not sure how closely that plan lines up with the 1 day AK Touring Plan, but if I only had one day and only cared about the big stuff that is what I would do.