Vauxhall/Opel is currently testing the next generation Agila. This prototype was caught testing in Germany with very heavy disguise.
The Wagon R and Agila share the same platform. Suzuki showed a concept car at the Paris motor show 2006 called the Splash which would hint at the next Wagon R.
Suzuki Wagon R prototypes have smaller, straighter headlamps unlike the Aglia in these images. The Opel Trixx concept was rumoured to hint at the next generation Agila. Both left-hand-drive and right-hand-drives prototypes are undergoing testing throughout Europe.
The Wagon R and Agila share the same platform. Suzuki showed a concept car at the Paris motor show 2006 called the Splash which would hint at the next Wagon R.
Suzuki Wagon R prototypes have smaller, straighter headlamps unlike the Aglia in these images. The Opel Trixx concept was rumoured to hint at the next generation Agila. Both left-hand-drive and right-hand-drives prototypes are undergoing testing throughout Europe. 
Mechanicals are still unknown but it's safe to guess both petrol, diesel engines, manual and automatic transmissions will be offered.