Your pleasure island series' blows me away, I have enjoyed watching them and hope to see number 5, the animation is amazing. In my opinion you have made some of the BEST animations in all of newgrounds and I have been coming to newgrounds for easily the last 15 yrs.
I came across a few forums that mentioned you may not make number 5, may I suggest if that this particular series is becoming too taxing perhaps make #5 the conclusion as I and others are on pins and needles awaiting the next Pleasure Island.
P.S. The five star rating is way too low for your vids I wish I could put 20 stars :)