Complex sentence: Karthik and Ajith Kumar team up again after the success of Unnidathil Ennai Koduthen, but this time, Ajith plays the hero while Karthik has the extended cameo.
Split into simpler sentences: Karthik and Ajith Kumar team up again after the success of Unnidathil Ennai Koduthen. But this time, Ajith plays the hero while Karthik has the extended cameo.