James Gunn pitched a remake of Creature from Black Lagoon

The John Carpenter/ Nigel Kneale version of the 90s was about a group of Creationists (led by John Agar) who want to disprove Darwinian theories by not finding the legendary Gill Man--but when they do, they decide to kill him.
Rick Baker was supposed to design the look.
It sounded like the Abominable Snowman, especially the ending.
Jennifer Connelly may have been a good choice for it.