No can do, in fact. It is my opinion from all I've read that particles and anti-particles actually come in internalized symbiote-like pairs, so both already exist universally despite the claims of some physicists who've either forgotten or never knew it to be the case in the first place. You have to realize that ultimately the Universe -- I say the infinite Multiverse Universe -- never loses nor gains anything, including anti-matter which, again, is integral to all matter at the particle level. Matter will go cross-eyed when smashed in any particle coliider natural or artificial, springing the two twins out from a single internalized particle unity. There are of course other results but this is the only one relevant. Again as I see it, every particle has its anti-particle twin indistinguishably built right into it, not so much hidden as simply unrealized until there is a smashing cataclysm for the particle that splits and births out the internalized twins -- as cataclysmic mirror opposite twins.
The energy released when matter and anti-matter particles come back together from the splits of any single penultimate -- if not ultimate -- unity into two ultimate opposites with just one, and one only, difference between them (left handed and right handed, so to speak) is energy already long, long, realized to the Universe in the Planck Big Bang Horizon. Even in a particle -- every particle instance -- the Universe abhors Utopia and will spring the Utopian into universes ready made for cataclysm at every Armageddon-like crunch time -- every attempted merger carried too far.... short of a blackhole singularity, maybe(!). All we do in our colliders, to a certain degree and for a time, is put a hold on the inevitable cataclysmic event.
As I see it, there is no such thing, never was such a thing, as a separate anti-matter universe since it already exists, always has existed, always will exist, twinned internal, integral, to the matter particle universe. It will remain so in the nature of universe with the springing into being of each and every possible particle from the "fabric", or "aether", or "vacuum", or void", or "quantum field", (whatever you might wish to call it) of space in the Planck Big Bang Horizon.