Simon Pegg is keen to appear in a fourth ‘Star Trek’ film, but thinks the franchise has been “forever tainted” due to the untimely passing of Anton Yelchin. The 54-year-old actor starred alongside Yelchin in J.J. Abrams’ sci-fi trilogy, though plans for another instalment in the series were cast into doubt after the young Hollywood star passed away at the age of 27 in June 2016 – just a month before the release of the third movie in the franchise, ‘Star Trek Beyond’. Pegg is still hopeful of returning to the film series but knows that a shadow would be cast over any reunion by Yelchin’s tragic…