I’m thinking in a totally different bubble here, but what if something came from Russia, China or even India.
Marussia kind of has it’s foot in the door already (even though they don’t make engines at all). China has several large car companies, (that we don’t hear much about) and it F1 picks up over there ever, all they need is a hero driver, I’m sure we’ll see chinese engineering at work.
India is another possibility, Tata is the biggest motor company over there and I’m sure they would give it a try when India becomes more prominent in the sport.
A real dream though would be JCB, that would kick ass, unlikley as it may be.