Hi Kari!
Well, I think it might be a little ambitious! But you CAN do anything if you really need to or want to!
The thing about Epcot is that it's HUGE. I'd rather do Epcot in 2 days! And like you said, you do NOT want to miss the Safari at Animal Kingdom. I personally head to the Safari first thing in the morning because the animals are a little more active and out then.
So, YES your plan is possible. But I'd be afraid you'd get to Epcot and feel like you had not done much by 2:00, you know? And because I love Animal Kingdom so much, I'd hate for you to miss any of that, too!
Why exactly are you splitting the day? How many days will you be there total? Have you been before? Do you know exactly which attractions you want to see in those parks? You can
ask me a question directly and we can talk about it more!