With no air molecules to blow into the soap film, there is nothing to create the bubble. Even if you brought your own air — which would be wise — the bubble you created would pop immediately.
On earth, when you create a bubble, the air pressure within the bubble is equal to the air pressure outside the bubble. This eaquilibrium of pressure, combined with surface tension is what gives a bubble its round shape.
In the vacuum of space, however, there would be no pressure on the outside of the bubble to equal out the pressure from within, so the air inside would burst the bubble instantly.
I don't think blowing a bubble in space is logically correct. As there is no air in outer space, what will you use to fill the bubble? Even if one blew it with one's mouth or a pump of air brought from earth, still there would be no air outside it and the huge pressure difference will cause the bubble to pop as soon as you start blowing air into it. Without equal internal and external pressure, a bubble can't be formed. What you'll need is probably a seemingly infinitely strong thin membrane(not even our body can withstand such tremendous pressure difference), but then you can't call it a bubble.