Complex sentence: He later came back to WCW in the mid 1990s and would occasionally appear on TV taking a more significant part as WCW Commissioner when the nWo invaded WCW in 1996, during his time at WCW he was chairman of the executive commitee of WCW.
Split into simpler sentences: He later came back to WCW in the mid 1990s and would occasionally appear on TV taking a more significant part as WCW Commissioner when the nWo invaded WCW in 1996. During his time at WCW he was chairman of the executive commitee of WCW.