Well I feel that there aren't enougfh events with Akatsuki, I was thinking something like this. (must be at least Jounin, you also don't get this event if you are in Akatsuki)
You are walking into the forest when you see something unusual, a cave where you here voice talking
(A) Go Inside
(B) Run away
(C) Wait in the Bushes
If (A):
You walk in the cave to see all Akatsuki members discusing something. The leader looks over to you and says, "Well, well, if it isn't (name), I've heard a lot about you, would you like to join us?"
(A) Sure
(B) I don't think so
If (A):
As you walk towards them when suddenly something stabs you through the back, everything goes dark. (you die)
If (B):
They Leader sighs and says, "A shame, you would of made a good member." You watch him make his leave, before leaving he says (to 2 random akatsuki members), "(name), (name), I want him/her dead." They both nod and the rest of the members take their leave.
Members you can fight:
Itachi
Zetsu
Kisame
Deidara
Sasori
Kazuku
Hidan
Tobi
They all have hp of 200-and up depending on you dk
Lose: You fall to the ground exausted, you now know why they are S-rank criminals, (aka member) finishes you off with one final move.
Win: You easily defeat the members and run after the leader. You run outside to find the leader gone as well as the resat of the members. Swearing, you are determined to find them again so you can kill them.
At least the journey wasn't a total lose, you turn in the dead bodies of (Aka member) and (aka member) and recieve (X amount) gems and (X amount) gold!
This is one idea for it.
Another is when you quit Akatsuki, do you think that they would just let you quit like that and give you your gems back? I don't.
I could be like an option in Akatsuki
(A) Give up Akatsuki membership
(A):
You decide to leave Akatsuki behind, seeing that there is nothing to gain from it. You steal back the gems you gave them and begin to walk out, but as you do you are stopped by (Aka member)! "Where are you going?", (aka menber) says while getting ready to fight, "Not thinking of quiting are we?" You realize you won't be able to get out soc easily and grab your (Weapon).
Akatsuki member: 200- and up depending on dk
Lose:You die by (aka member)'s hand (You die and don't get the gems you paid to get in. you still however get out of Akatauki
Win: (aka member) falls to the ground defeated. You are about to make the finishing blow when suddenly you hear a noise. "Another member?", you think to yourself. Not wanted to risk anything you take you gems and leave. (get out and keep you gems you used to get in)
After you do quit Akatsuki, they will sometimes be attacking you in the forest because they want you dead. (It does this 4 times randomly and them stops.
Event: You sit down to rest when suddenly kunai come flying at you, you quickly move out of the way. You see (Aka member) only 10 feet away from you, "You shouldn't of quit", he says with a smile on his face.
Akatsuki Member: 200- amd up depending on dk
Lose: After being defeated you remember dieing a slow and painful death, (Aka member) made sure of it.
Win: You quickly kill him and take you leave, looking for a lake to clean the blood off your weapon.
These are my suggestions