Well I read some where that GDT only planned on making 3 HB movies tops, so I reckon if this one works it'll be a third for big Ron and no more. That would fit in nicely if GDT did go on to make a BPRD movie...he didn't say he wouldn't after all
A Lobster Johnson spin off wouldn't go a miss either

(If GDT gets his way, he might appear in HB3 with big Bruce "Hail to the King Baby" Campbell playing the role. He played the cameo in the animated "Blood and Iron" after the credits after all)