Trying to forecast the conclusion of Little Dorrit

Closer to the end of Little Dorrit (Dickens), I realize that I have no conscious memory of how this novel concludes - I first read it decades ago, and I saw the BBC adaptation on TV many years ago as well - so I will speculate here on how CD will bring this novel about. At this point there are two pathways: the protagonist, Arthur Clennam, now in the debtors' prison as he's lost all of his (and his business partner's) money in the financial debacle that the forger and thief Merdle caused, has begun to realize that all this time he has been in love w/ "Little" Dorrit (a Pygmalian, My Fair Lady romance?), and just as he realizes this the young man who has been madly in love w/ LD from the outset, John Chivery, the son of the prison turnkey (and now in that role himself) declares his hatred of Arthur, which A can neither understand nor fathom. John tells him that LD has always loved him, that is Arthur - hey, maybe it's a Gigi-type romance? So to all appearances at this point the two - Arthur and LD - are in love w/ each other, so the probable course for the narrative is to bring the two together, happy ending. But this is late Dickens and a really complicated novel, so I suspect he will follow the course of Bleak House, in which the old man - Arthur, in this case - reluctantly cedes his love to the younger generation, that he steps aside and that John Chivery marries Little Dorrit, in a happy ending with a Shakespearean touch of melancholy. But can Chivery really stand up to LD? Is he really the right guy to ensure her happiness? And what about the other unhappy marriage - Pet's marriage to the odious Gowan (sp?); and what about Tatty/Harriet - hasn't she earned a role in the conclusion as well? Should she marry Chivery, or is that a marriage "below" her? And what about the great wrong that Arthur's late father committed, presumably to the detriment of the Dorrit family, which Arthur has tried to rectify? One thing for certain: Arthur's business partner, Doyce, will return from American w/ a fortune, enough to lift Arthur from debt and to keep their business partnership in the black.