Disclosure: The following is based on my voluminous knowledge of American pro wrestling(based on playing a pro wrestling video game, in college, when N64 was current tech).
Thinking about this it seems to me that you would want your signature submission to hold to the following:
1.) Must look legit. A familiarity to MMA fans would be a plus. It cannot be out and out ridiculous.
2.) Must be able to be applied to a variety of shapes and sizes of opponents. You may be wrestling a guy built like fat bastard one night and Shaq the next so if you personally cannot make the move look ok on a variety of sizes it will have less value. You won’t be able to hit your signature as often, then it won’t actually be your signature.
3.)Must be able to be applied in a variety of situations/positions. If you can only do a move with a certain long, precise set up, that your partner needs to have down than AGAIN you will have less chances to use it.
4.)Must not require a lot of knowledge/skill in your opponent. I realize you will be working with someone who should be co-operating with you and that is largely a different world from where I live, but you probably will not be dealing with someone who knows all your moves, all the time.
YOU need to be able to lead them/hit the submission and there should be as little a chance for them to accidently fuck it up as possible. Some exotic pretzel hold may look good, but if all your partner has to do is put his leg in the wrong spot to stop it may wind up sucking.
5.)Must not require a great degree of flexibility in your opponent. Again, you will be going with different sizes, some of them will be stiff, injured, etc. You want this to work with ANY one. Not just a young, healthy, guy.
6.)Low chance of injury. You do not want to injure your partner because he rolled the wrong way.
Given the above I am going to suggest the Kimura(BJJ), a.k.a. the double wrist lock(shoot or catch wrestling), a.k.a. ude-garami(Judo).
The hold get’s its name in BJJ circles because a judoka named Kimura used it to defeat Helio Gracie years ago.
- YouTube
So it has plenty of Judo/BJJ cred.
Here is Kimura demoing it and other techniques:
Years later a pro-wrestler turned MMA fighter named Sakuraba used it to great effect:
Sakuraba Highlight
Sakuraba using the kimura
Josh Barnett, another pro-wrestler and great MMA fighter using it
Here is an old school pro wrestler by the name of Billy Robinson showing the technique and footage of Sakuraba using it in MMA fights
It has serious, SERIOUS pro-wrestling/japanese pro wrestling/MMA cred.
The Kimura/double wristlock does not require that you pick up your opponent or get so wrapped up with them that body types will be a huge issue. Someone with much longer arms than you can pose something of an issue, but there are plenty of ways around this even with a resisting opponent. If they are not out and out fighting you than you can handle it.
You can hit the lock standing, off your back with your opponent in your guard, or from the top. Additionally you can pull your opponent up onto their side, like in the Barnett clip, which would give everyone a good shot of your face and give you a chance to flex while “applying” the submission.
Your opponent/partner will not need to “know” the hold in order for you to do it.
Flexibility will determine how far you have to take the lock in order to “take it home”, but for your purposes you never need to, or want to, get to that point. As long as your partner has enough flexibility to get into the basic position you have “hit” the move.
As long as you do not actually try to take the arm/shoulder this is a pretty damn safe lock. You can roll around with someone while having it framed up and never injure them. Additionally, you can do the move “wrong”, with too much shoulder extension(as opposed to abduction and internal rotation), and make it look like you are twisting the hell out of them without them being in to bad a spot. This gives you an opportunity to “sell” your opponents heart.
You may be wrestling individuals with a significant injury history. Many will have A bad shoulder. However far fewer will have two bad shoulders. This means you can still hit your move on someone who might dislocate their shoulder in a spirited game of paddy cake or who cannot even scratch their back with one arm simply by going to the other side. This gives you twice the chance of being compatible than if you pick a spine lock.
Hopefully this helped.
Regards,
Robert A