These are all films that have anything to do with some sort of BLOB in them. Some are funny where others are supposedly scary. Hopefully this can give us some inspiration.
Monsters Vs. Aliens - BOB: (2009)
The Blob (1958)
Ghostbusters - Slime (1984)
The Green Slime (1968)
The Invisible Man (1933)
Fantastic Four - Invisible Woman (2005)
P.s Didn't know they were making a new one!