It kinda looks like Pete's Dragon....
Although yes it looks like this case has been closed with the Basking Shark theory, I still wonder. I have been unable to really find a good picture of a Basking Shark skeleton. I did run across one site that has the image below:
The top picture is the drawing done by the guy who took the pictures of the rotting "thing" we're talking about, this is a sketch he did of what they saw. The bottom picture is of a Basking Shark skeleton. Interesting I'd say.
Here's the site it came from:
http://www.cryptozoology.st/
Though that skeleton looks really weird. I couldn't find an independent site that had a picture of the skeleton. Anybody wanna have a crack at it.