That is certainly feasible. At this point it seems best not to entrench on any dogma.
It is just a possible metaphoric relationship with the Bible and these entities. And it is extrapolation of course. But how would you explain photosynthesis to a three year old? You would have to use analogies and metaphors they might understand to explain something completely beyond their primitive mental capability and understanding. I think this is what the Bible is meant to do.
And when one studies the tradition and beliefs and faiths of other cultures they also hint at the same concept. Such as the Hindu and Buddhists believing in parallel dimensions for thousands of years now. The Hindu and other cultures even tell of a great battle in the sky between these advanced entities. Put all these together and many things start to make sense as a viable possibility. :)