Question 73-S3 - It is my understanding that each universe was created one at a time, drawing on the knowledge gained from the previous universes. If this is so, then does our future hold an 8th (or more) universe?
A. It is certainly a possibility, but I cannot say with any certainty that this will occur or is part of the divine plan. I have to answer, "I do not know".
Question 74-S3 - In the myths of our culture, are there references to the other six universes?
A. No. The singularity of the physical universe is one of the most pervasive and persistent myths affecting all cultures throughout time. The seven universes are sometimes confused with the inner dimensions of consciousness, but these inner dimensions correspond to the physical universe - hence, each universe consists of outer and inner dimensions, and these multiple dimensions are most potent where the greatest concentrations of life forms exist.
For example, the inner dimensions of Earth are far more developed and multi-faceted than those that exist around Jupiter, despite the fact that Jupiter is precisely 10.7 times larger than Earth. The concentration of life forms and the accessibility of these life forms to the Genetic Mind, Source Intelligence, and Entity Consciousness create this interwoven, multidimensional matrix of worlds.
When multiplicity or "worlds", "planes", or "realms" is depicted in myth or even modern day descriptions, they are referencing these inner dimensions, and not the seven universes of the physical Grand Universe.
Question 75-S3 - Do the myths of our culture also reference the beings from other universes - or just our own? For instance are angels from another universe?
A. The physical instruments of sentient life forms of the other six universes do not crossover into our universe, or vice versa. The seven universes are isolated vibrationally (spatially) and genetically (bio-structurally). This helps to ensure that the evolutionary pathways of a species in one universe do not collide or conflict with another. It enables diversity. It enables near-infinite evolutionary extension. While the physical instrument cannot crossover, the individuated consciousness can.
And to this degree there are some beings that "migrate" from one universe to another. This is not analogous to the ascension process. Regarding your question about angels, angelic beings are not from outside universe seven (our universe). Indeed, neither are they from outside our galaxy.