they'll tie it in with the MCU. Herbie was actually the soul of a enemy of Red Skull who was transmogrified into a VW type 1 by evil hydra member Dr Ferdinand Porsche. Herbie escaped and this led to the events of the the films from 1969-to-2005.I'd actually be shocked if there wasn't somebody at Disney working on a new Herbie project.
It will further turn out that Captain America was the one who discovered Herbie's origin and saved him when he went back in time at the end of his career. Having watched the events of the world around him the last 20 years, having been powerless to affect the world around him for good and only emitting greenhouse gases and being used to occasionally ferry Maggie Peyton around, Herbie reaches an existential crisis and tries suicide by driving off an embankment at high speed.
He's recognized in a junk yard as the famous racer of the events of 1969 and given a new electric motor and suspension, body rebuilt with a powerful AI system derived from the Knight Foundation because we're mixing that in too. The soul of Herbie now has to contend with his own immortality as well as his love and hate relationship with an invasive AI that both comprehends him but refuses to accept the incredible reality of his existence. Herbie than completes the Paris-Dakar, managing to stop an evil Tesla from exploding at the finish line and setting about World War 4, but sacrificing himself in the act.
The Messiah Bug will leave audiences and critics puzzled and torn, and be the movie that finally hastens the collapse of Disney.