Well I do not think Conde had ever a precise candidate as I think Enghien’s opinion about wedding was “I will marry Charlotte or nobody else”....
A slightly different Condé more worried about the survival of his branch of the family and so, resigned to accept who he will not prevail over his grandon’s will (as he likely hoped to do in OTL), he will give his consent to the wedding soon after the exile and so the Duke of Enghien and Mademoiselle de Rocherfort will marry around 1792-5. She was five years older than him and so in her middle/late twenties but that will still give them time for having some children (maybe a couple of boys, a daughter and one or two short living children? She will be forty only in 1807 so a wedding before 1797 will give them at least ten years for having children).
Amelia can wery well marry Berry as was proposed if the OTL circumstances who make fail the match are butterflied: if really Berry caused an half scandal giving too much attention to both Amelia and Cristina maybe the latter here was not interested in him or already married (OTL she married Carlo Felice of Savoy as both his brothers were sonless in 1807, here maybe one of his older brothers became widowed around 1794/6 and remarry to Cristina)
Plus it's not like he'd be likely to get a royal bride in exile. The only two Bourbon marriages made in exile were the Angoulêmes (both Bourbons) and the Orléans (one an Orléans and the other a Borbone-Due Sicilie). The only Princess I can find associated with Enghien was Caroline of Baden and that was circa 1795, as Caroline married the Elector Maximilian I Josef (later the first King of Bavaria) in 1797. So any marriage for Enghien and Rohan would have to happen in 1796 or later. Sense we know so little about Enghien and Charlotte, it's entirely possible that the two could produce children after their 1804 wedding considering that they were only marriage for two months before the former's execution.
Also Berry wouldn't likely get the elder daughter Cristina as he's a penniless exile whose third in line, so he'd get Amalia instead.
Which of Enghien's aunts was fetched up in Warsaw? Wasn't Enghien with the armée des emigres (or whatever it was called) and trying to get some support for an invasion of France? I know he, his dad, Angoulême (and I think Berri) all fought in said army, but I was under the impression that that was why he was so close to the border.
And asto Orléans, I admit didn't really give much thought to him dying (it doesn't have to be an expy of Enghien's execution per se, just that Orléans ends up dead (and his brothers too) with no heirs - besides maybe his sister who becomes a sort of Grande Mademoiselle 2.0)). Not to mention, Orléans was doing most of his globe-trotting (Milan, fathering a bastard daughter in 1794, Finland and sowing his wild oats there in '96, then off to America and back) before he settled down in England. I figured the French Republic could easily catch him during his travels and throw him in a jail cell for a few years. Napoléon's just the guy who has the stones to sign the death warrant after a renewed Bourbon attempt...
Louise Adélaïde de Bourbon, Mademoiselle de Condé and Abbess of Remiremont. She was the would-be bride of Charles X, was appointed Abbess in 1786 and took vows in Poland in 1802. Not sure about that part however; the last major Armée des Émigrés, the Condé, dissolved in 1801 and most of the Royalist conspiracies against Napoléon originated from the Comte d'Artois and England during this time. In fact, I've never heard that he was involved in any conspiracy at the time of his death; that sounds more like Napoléonic propaganda.
As for Orléans, Napoléon should be aware that executing the son of Philippe Égalité would be more likely to win him private praise from the Royalists than any real criticism. Sure it would be a message but not the one as powerful as executing the son and grandson of the Counter-revolutionary army leader.
This bit of interesting info just came across my radar. Apparently, Maria Luisa of Spain - one time queen of Etruria - was offered/considered for a remarriage for the comte d'Artois at the Restauration. I'm not sure on the specifics, besides the fact that Maria Luisa was offering herself around like some two-dime whore (which is probably why the French refused) to Ferdinando III of Tuscany, the duke of Modena and the Prince of Saxony who later remarried to her daughter. Either way, would she still have been able to fall pregnant by 1815? She'd be in her 30s, not old, but it's hardly as though this is the first marriage for either of them. It would be funny if she marries Artois and has one or two kids by him (at least one boy), and they both end up dying before Louis XVIII.
Would never happen. Artois apparently a vow of perpetual chastity after the death of his mistress Louise de Polastron in 1804. She was basically his Madame de Maintenon and probably would have become his secret wife if she had outlived her husband. It's telling that even after Berry's assassination no one brought up the possibility of Artois, as the last single male left that could father children, remarrying.
In that situation this sister heiress will became Berry's wife if they are both still unmarried
Most likely yes; after all Adélaïde was mentioned as a bride for both Angoulême and Berry at one point or another, so her marrying Berry isn't unlikely. Now she wouldn't be popular at Court or among the Bourbons (Madame Royale in particular would hate her) but she might be able to fit in with Artois and Berry, both lovers of high society like she was (plus Berry was 19th century moderate so that's a plus). However, if Adélaïde refuses to marry Berry, then Louis XVIII might just seize the allodial possessions of the Orléans outright at the Restauration. After all, her father Philippe Égalité unarguably committed treason when he voted for the death of Louis XVI, so he would have forfeited all his possessions to the Crown. Now that wouldn't deal with the Penthièvre estates; they would still legally belong to Louise Marie Adélaïde and would pass to Adélaïde unencumbered.Though I do remember that Louise had to fight lawsuits to get her inheritance back after the Restauration, so perhaps she wouldn't win them here or something.