Do you really think they'd only take 1 photo (isn't even convincing; looks fake), and just chuck the corpse into the sea, of the most wanted person in the whole world?
The US Milatary has an undercover Taliban person in it. They've gathered troops in Pakistan and forced them to reveal Bin Laden has been killed; causing the US to lower their defences.
Bin Laden will srike again. He has horcruxes.