Complex sentence: It was announced that he would have a role in the Aquaman-based show "Mercy Reef", however due to the integration of The WB and UPN for the new network, CW, "Mercy Reef" was not picked up.
Split into simpler sentences: It was announced that he would have a role in the Aquaman-based show "Mercy Reef". In the integrating of The WB and UPN for the new network, CW, "Mercy Reef" was not picked up.