Well, the rumor is that the extended release has more fighting at the end...which might include Merry hacking up some arms. That would be...what's the new cool word? SWEET! Or maybe there could be a flash-back, where M and P are telling the three hunters what happened...we might could see some hacking there.
Hehehe....why do I get this mental picture of M and P ...exaggerating...their deeds in battle?