Well while this is merely a different reasoning one thought on the subject is that there was no infinitely dense ball of energy etc as what started the 'Big Bang' was a universe colliding with ours which caused a massive ripple through the previous universe that was here which broke all matter down to its base components causing a universe wide 'reset'if that theory is correct then whose to say it won't happen again or hasn't happened a billion times before. To paraphrase Neil DeGrasse Tyson 'nature creates nothing in ones there's no just one form of life,there's not just one planet,star or Galaxy so why would we logically believe there is only one universe'