Don't disagree with the terminal expansion sentiment, however the reality is that the terminal needs a complete rebuild to increase size and capacity considerably and I don't see the land or the money from the owner being made available. (Still waiting to here when the next proposed stage of redevelopment will kick off!! Any clues?) Don't know how much more tinkering with the current buildings can be done or what could be achieved of any significance. Envy the mega million investment into new terminals at Manchester.
Why do you feel a rebuild is needed? There is plenty of room between the current terminal and the South East pier for expansion. Even the South East pier can be expanded if needed.
We are far from needing a new terminal, and given the recent investment in the international arrivals area and new security area, it's pretty clear there are currently no plans for one.
Given the amount of growth this year however, and if the Emirates / Chinese rumours are true, I'd expect an announcement shortly regarding further expansion in order to be ready for next summer.