New novel from Bentley coming from CD this year. I don't know the exact release date, or what it's about, but it's mentioned on his agent's website dalainc.com/wordpress/?page_id=736 and also on reddit - https://www.reddit.com/r/horrorlit/comments/5663hh/bentley_littles_next_novel_will_be_the_handyman/
I don't know if it's a sequel to THE CONSULTANT, or if he will ever write a sequel to THE CONSULTANT. I suppose the only people who would know would be those at Cemetery Dance.
Regardless of whether he writes a sequel or not, a quick look at amazon reviews for THE CONSULTANT shows there are a lot of people who want to know what BFG stands for.