I hope they include the Kid's Bug Garden again (and I hope it's bigger and better this year).
That was the prime reason we returned to Epcot again and again during the last 2 F&GFs. Tasha's favorite thing to do at WDW is to make friends, and even though the play area was small, it still was a gathering point for kids and she would spend hours in that area, while I relaxed on a bench waiting for the next ladybug release that we could participate in.
Hopefully we get there early enough to catch the butterfly releases as well.
Of course, we'd rather they build a permanent Kid's Pavilion in the World Showcase filled with themed 'equipment', perhaps representing different playing 'habits' around the world. It could also feature a plethora of kids favorite foods from around the world, too!