Here’s some news about the third Creeper flick, including the title:
Jeepers Creepers III: Cathedral.
Salva spoke to Fangoria and said that
“The script, now titled JEEPERS CREEPERS III: CATHEDRAL, is about to enter preproduction at MGM and does include a prologue in the Old West where we see how the Creeper became a frightening part of cowboy and Native American folklore."
He went on to say that the after this flashback, the third movie picks up right after the second one. He said that part of the third film features Trish Jenner
“who, 23 years later, has a teenage son of her own, named Darry after her long lost brother. Trish is having a terrible recurring dream where her son meets the same terrible fate as her brother. Now a rich and powerful woman, Trish is determined to stop the Creeper once and for all.”
Among other thoughts about the script, Salva said that this movie will be
“ . . . the biggest film of the three, include some of the scariest and most intense Creeper stuff we have ever attempted.”
FANGORIA? - America's Horror Magazine