The official Earthworm Jim facebook page recently updated with a few lines speculating as to what they would call a fourth instalment in the franchise.
Writing on the official Facebook page, Earthworm Jim creator Doug TenNapel wrote:
'Everyone loves Earthworm Jim 1 and 2, and I don't generally acknowledge EWJ 3 as a real part of the Jim universe. So if I was making another Jim game, would it be too confusing to call it Jim 3? Or would it have to be Jim 4? How about "Earthworm Jim 4 the Fans"?'
Way back in 2009 ONM declared the Earthworm Jim 2 'The funniest game ever', so the possibility of a fourth game (especially when the third isn't considered 'canon' by TenNapel himself) certainly has us excited!