I agree WB, the more I think about this, the more likely Red Bull seems, as you underlined yourself, engines is an area which is not covered by the RRA and Mateschiz is obviously no stranger to spend in heavy doses to get what he wants.
This could mean the Peugeot connection is just a coincident, they might brand the Engine "Red Bull" in order to have a direct connection between Newey and the engine designers, making sure that every little detail is without compromise?
Why Pollock then? I have been thinking about that and it could be that there's a relation between Newey and him since the early JV days with Williams, it's also likely that they knew each other from his CART connections with Bobby Rahal.
But the real connection is probably between Newey and Christian Contzen, who ran Renault Sport during those successful years with Williams through the 90s, while as you say, Pollock is just a neutral figurehead, the promoting type that he is.