Unless a Brabham is actually involved in the team I don't think the name should return. However, I always want to see new teams
I think Jack Brabham's grandson may have a chance, but this is thinking way into the future. http://en.wikipedia.org/wiki/Matthew_Brabham I saw him recently on Sky Sports F1 in a small show about him, looked impressive in changeable conditions.
I still would prefer VW to enter, rather than a smaller team with limited funding. We need someone to upset the apple cart.
Won't happen because on F1's end Ferrari call the shots and on the manufacturer's end it's too much of a risk for a major manufacturer to enter from scratch. (see also: Toyota)
I very much doubt VW/Porche will come in as a constructor. Renault have proven (twice) that its more profitable to be a supplier. When Honda and Toyota come crawling back they will do the same.