Richard Robinson:

Ok, Ranma could disown his parents, then if they threaten
him Kill them. He doesn't feel anything for them, so he
won't miss them.

Errr, Ranma is not homicidal. Closest he came to that was in his battle
against Saffron, and even then he had little choice but to cut loose with
everything he had. Also he still loves them, even if he hates what they
have done to him.

Akane will get her wish and can own up to Mousse, so she
will accept the changes.

True. The ironic thing about that is, both sets of 'couples' would be
happier if the truth was revealed. It would work out perfectly, as far as
the four involved would be concerned.

Ukyo will be unhappy

Only insofar as she won't be getting her inheritance. And that Ranma would
choose the 'bimbo' over her. ^_^

but I think Nabiki would offer to bribe
Ranma to marry her and accept a divorce.

Conceivable, but she'd have to know the whole truth of the situation, and
she doesn't.

This will provide enough money so he can leave Cologne
behind, if she doesn't accept that Shampoo doesn't want to
return to the village now. They can afford to have Cologne
treated with mind altering Jhusenkyo water

Substitute Formula 110 shampoo for Head and Shoulders, eh?

and use the ladle
to freeze her in her cursed form.

Pity Herb has that somewhere in China and isn't likely to let it out of
his sight after all the trouble it has caused him in the past.

For the sake of interest,
a young and female form but one who doesn't remember being
Shampoo's enemy.
That leaves Soun and Kasumi and Ryoga to try to repair the
damages

Nah. Soun still wants Ranma to get married to one of his daughters. Ryouga
will still want Ranma, though Kasumi would be happy playing with her
doctor. ^_^

and get everything back to the way it was, Good

Luck, they'll need it, bad. Also if an Amazon Marriage is
acceptable legally in Japan ( some foreign marriages are
legally binding in the U.S.A., even though committing the
marriage here is illegal ) Nabiki and Ukyo could marry Ranma
and Shampoo, then divorce after Ukyo's father dies. That way
Ukyo would get all of her inheritance, not just half, of
course she'll have to share some with Ranma and Shampoo and
Nabiki but there are worse things.

Perhaps, though it's not likely Ukyou would see it that way. She still
hates Ranma for leaving her behind.

Thanks for the comments.

D.B. Sommer