How can people have the diamond cutter on their list and not have the RKO. They are one in the lame...same. Along with the Dudley drop, and Twist of Fate.
Anyone can mark out to their favorite wrestlers just to pretend like the move is something special. As the above the moves are only as devastating as the other superstar sells it. The RKO-Stunn-Drop of fate is sold well.
http://www.youtube.com/watch?v=YWvA6pswAOA
As with most moves the spot has to be one or it comes off looking like crap.
Powermoves that don't need that are the moves that look real, the superstar will always have to play it off but some don't give them much of a choice.
Border Toss- Hernandez A modifier Razor's Edge but the superstar is thrown 1/2 way across the ring. The move is extremely dangerous, but still comes off as a power move.
Jackhammer -Goldberg Start with Goldberg is garbage. But it doesn't take much to get a suplex started, however once your in the air for 10-20 seconds their is nowhere to go but down and once you hit that mat the shock is enough to keep you down. It looks strong it looks painful.
Batista Bomb and Last Ride Both are simple power bombs with a touch of ouch. Batista pulls the Superstar down and slams him, where take just gets you to that 7 foot mark and drops them. Both Leave a lasting impression if not on the superstar, sure enough on the mat.
Shooting Star Press- Kidman,Air BourneNot everyone can pull off this move ( ask Brock Lesnar) The set up is more work than the finisher, but the move itself looks sweet and smooth, and you can't just do it at a moments notice.
Now since the premise of the thread was a devastating move, that was believable, had power and could be pulled off at anytime. The best finisher is
WMD- Big Show
Can the moves be used at any time?
Yes
Is it devestating?
Yes, just ask anyone who fought Tyson
Is it believable?
Yes, again Tyson
Personally of all the moves I personally like
The Famasser It is a direct shot to the head, it comes at any bent over superstar. Can it come out of no where sure, there were a few times he did it in a suit.