No. I'm not sure exactly how PPVs work in America, but putting both on the same day will be a disaster for both companies. By going head to head on TV, the ratings of both companies would be boosted by people flicking back and forth between the two; putting PPVs on the same night won't do that.
What people often don't realise is that PPV audiences have been comparable for about 15 years, even as TV ratings tanked. What that says is that the PPV audience is essentially the hardcore audience and nobody else will ever watch, except for WrestleMania sized shows. What does that mean? It means that head to head PPVs will do nothing except split the audience, which isn't in anyone's interest.