Great to see some much-needed investment at Chessington, though I must say it's sad to see such a sudden loss of Wild Asia. It's definitely one of the park's better themed areas, one of the few remaining to be untouched by IP or gimmicks, and has a great soundtrack to boot. 15 seasons isn't a bad run at all, but it will be missed.
Even with a new coaster coming, surely this doesn't have to be a 2 year project? Is it possible it's being closed now rather than later in the season as yet another cost cutting measure? Would be a real pity if so, and as Matt rightly says the park will struggle even more than usual for capacity over the next couple of seasons. Long gone are the days we said farewell to lands with epic custard pie fights and had the whole area transformed in time for the following season...