I know quite a bit about the ten year plan, and hope to be of use. From what I know...
- The African Valley, as you've been discussing, will initially hold some present species that will be connected from current housing: zebras, ostriches, etc., later adding the giraffes and rhinos to the mix. A safari bus (eg. Port Lymnpe) or a train (eg. Whipsnade) will be added later on, and one or more waterholes will be dug in the gap between the valley.
- The paddock opposite the coatis will become a new complex for gorillas. This is another of the most put-forward plans, and should materialise within a few years.
- The woodland opposite the entrance pond will become the British Woodland area; visitors will be able to take a nature trail, whilst discovering native species like dormice and learning about Marwell's in-situ conservation work.
- The Entrance & Gift Shop will be relocated to the site of the former restaraunt, Treetops, into one large 'visitor centre' complex. The current gift shop would then become the zoo's new tropical house, specialising in South American Rainforests. Tropical World would then likely become home to Komodo Dragons, as it is in the South-East Asian biome area.
I'm a member of the Oryx Club there, so I go there nearly every month, therefore knowing the zoo like the back of my hand.

If anyone wants to know something about Marwell, please ask me.
