Complex sentence: His upcoming projects are with director Mohan Raja tittled Velaikaran where Sivakarthikeyan will play the lead role and he also signed a movie with Nivin Pauly.
Split into simpler sentences: His upcoming projects are with director Mohan Raja, titled "Velaikaran", where Sivakarthikeyan will play the lead role. He also signed a movie with Nivin Pauly.