If they opt for the ending of the novel.....
...it will be very hard to transfer it to the screen:the bottle in the sea ,a flashback?
The Soviet version(1987) already did it and managed quite well without cops and bottle (by showing glimpses of the characters' past ,notably Vera ,Cyril and Hugo ,which justifies her final decision ,Lombard in the jungle (a nightmare he has,an impressive sequence))
to people who've seen that version,do you think that one can improve it?
I wish I could be like Gladstone Gander.