Marvel has announced that in June they will finally be publishing Gerber's last Man-Thing story, four years after his death. Infernal Man-Thing will be a 3-issue miniseries illustrated by Kevin Nowlan. You can read what Nowlan has to say about the project on Marvel's website. Below is the cover to issue number one by Art Adams, plus the variant covers by Kevin Nowlan and Gil Kane.
Infernal Man-Thing #1 cover by Art Adams
Infernal Man-Thing #1 variant cover by Kevin Nowlan
Infernal Man-Thing #1 variant cover by Gil Kane
I'll definitely be picking up this series. Thanks to Mike Sterling at Progressive Ruin for alerting me to its existence, along with the 1200-page Man-Thing Omnibus: