Imagine, if you will, if this had actually happened. You may be thinking, "Well, Vince woulda slaughtered NWA/WCW once more," but there's a twist to the tale.
After McMahon planned to run a three-hour episode of Prime Time Wrestling opposite NWA's Chi-Town Rumble pay-per-view, Turner fired back by plotting to hold WrestleWar on April 2, the night of WrestleMania 5. Dave Meltzer noted in a Wrestling Observer of the time that Turner had deeper broadcast connections than Jim Crockett Jr. had in 1987, and actually had the drop on McMahon in terms of getting cable companies to side with him. McMahon may have been left to make most of his non-arena revenue off of closed circuit airings.
So what happened? McMahon lowered his demand for a cut of PPV revenue in order to get the cable outlets to choose WrestleMania 5, which dampened his profits a bit. Turner chose to hold WrestleWar in May instead, and ran a free Clash of the Champions on TBS against WrestleMania, just as had been done in 1988.
But man, what if...