James Gunn feels “forever grateful” for the “goodness and kindness and love” he experienced while making his new ‘Superman’ movie. The director has revealed he’s finally finished filming the project – which stars David Corenswet as Superman/Clark Kent and Nicholas Hoult as Lex Luther – and he’s expressed his gratitude for the “journey” in an emotional message posted on Instagram. Gunn wrote: “And that’s a wrap. God bless our cast and crew whose commitment, creativity, and hard work have brought this project to life. “I set out to make a movie about a good man in a world that isn’t always so mu…