Finn book two is bagged in floppy form as a free bonus with this month Judge Dredd Megazine #361:
Notice that Rebellion doesn't plan to reprint the rest of the material.
Defoe will return later this year in The London Hanged. Rebellion has released this stunning teaser illustration by Leigh Gallagher:
And Clint Langley has uploaded on his FB page this very intriguing illustration for a project with Pat Mills: