Meh. For all intents and purposes, supernatural phenomena do not exist.
Anything that happens in our universe* or in any way affects it is unavoidably an integral part of the universe. Everything that happens in the universe is thus a natural phenomenon. Supernatural stuff can not, by definition, affect our universe because then it becomes part of our universe and thus a natural phenomenon.
"Supernatural" is just a concept often used to inaccurately describe things that don't seem to have an explicable origin, and more specifically seem to have an unknown, conscious origin. That doesn't change the fact that everything observable is part of the universe, and conversely, anything that is not part of the universe does not exist. Ergo, god(s) cannot be supernatural and must be natural entities.

Whether or not one or more of these powerful, personal entities have affected the birth of Earth, life and it's evolution, we have no way of knowing for sure. I personally doubt it and don't think it's necessary in any way. But as it stands, it doesn't seem to make much of a difference because these entities sure did a good job of hiding themselves of something really *did* all this.
In other words, it's possible that all that is was actually made 10:12 pm last afternoon and our neurons just remember things before that because they were all set individually, but this is more of a Flying Spaghetti Monster domain of theologic theories and quite obviously highly unlikely. But possible, of course.
As to the original topic, the realism of Vasudans: I think it is certainly plausible to think that there would be other beings in universe with a torso, lower and upper pairs of limbs and a head of some kind, walking in more or less upright position. It's a pretty vague form and leaves a lot of things to be decided by evolution, such as the structure of the skeleton (endo/exo, amount of joints in limbs, chemical composition), cell biology like how to produce energy and from what elements, how to store genetic material (DNA, RNA, other mechanisms), what to consist of (proteines most likely, but polymers are also an option for example), internal organ position, nervous system structure (central nervous system or distributed nervous system), fine tuning of sensory organs (what wavelengths, sound frequencies and chemicals they would sense, and also the more exotic sensory organs like electric and magnetic fields)...
The existence of another humanoid beings in the universe is pretty much sure given the huge size of it.
Now, much
less likely is to encounter one of the races set to the vague humanoid form such close to our origin system. Or any kind of sentient species at all to begin with.

*note that when I'm talking about universe, I speak of everything that affects each other. So actually universe in this context is the multiverse, but at any rate I think that multiverse is the actual universe in the true sense of the word... and what we know as "universe" is actually just a "verse". Or perhaps it is our observerse...
So, commonly used term "universe" would be "observerse" (the part of universe directly observable to us, also includes the parts beyond
the red line the expansion event horizon), and consequently the term "multiverse" would be the actual "universe" (includes all observerses).