The whole west side of Future World is really all that remains of the OLD Epcot and I would think that these pavilions SHOULD see some major work as part of this re-imagining.
While the Land pavilion is great for Soaring and a bite to eat, not many go there for the boat ride. The Seas, is a VERY weak aquarium when compared to small, local aquariums, and I am not even sure if you can consider the Nemo ride a ride .. more of an relaxing entrance to the pavilion.
And we dont need to say a lot about the Imagination pavilion.
I could see the them heavily updated, but not bulldozed. I could see them totally losing their pavilion/education concept (which, they pretty much have already) and putting in more exciting/desirable attractions.
If it wasnt for Soarin, that whole side of the park is skippable.