Usual answer I hear for this kind of questions on science-show is that it's hard to talk about what is outside of the universe as there is nothing before big bang or outside the universe. But there is inflation model of big bang which states that there are bubble universes stretching over infinite space time and, each of those universes can have it's own rules and constants.

At the moment there is no known way to verify this but who knows whether in 100 year some idea come up.