Hello from a (former) lurker, here my predictions:
BelgiumMathilde gets more children and will start to look worn out, which suits her saintly smile. Philippe will make more gaffe's.
Paola and Albert go even less to Belgium and stay in their French villa even more. Still the king does not want to involve his son and leaves everything to his staff. Paola will turn even more catholic, so she can ask for forgiveness for all the times she cheated on her husband in the past and for the lousy mother that she was. As soon as the boobs started hanging she turned all pious...
Laurent will blabber more to the press, esp. about his father.
Amedeo will be seen with an aristocratic girl, his father has high standards for him and the boy is to afraid of his parents to say no.
Fabiola will take a hunting gun to the next national day. She only shoots in the air though.
LuxembourgMore children for 'princess' Tessy (what a joke).
Maria Teresa will lose/gain/lose/gain/lose/gain/lose/gain...etc. weight. And her face will start to look like Silvia's.
Grand Duke Henri will refuse to sign more laws, maybe about gay marriage.
Guillaume will be seen with a terribly boring girl and they will marry.
Alexandra will be prettier than ever.
Marie-Astrid will become a grand mother and she will release photos, which show a happily arranged family, all with the perfect smiles and hairdo's. Maybe one of her sons will get engaged to something aristocratic from Belgium.
Guillaume will probably end up following
grandpapa (the former GD) Jean, and marry her, get bored,
then have a string of (decret) affairs 
(judging by precedent - a Pia Haraldsen type)
That girl certianly messed him up during his studies at Durham, with all the intro to the ciggies, wild life etc, until MT and Henri intervened and wanted him to pull out and start a fresh at a new uni (Brunel Uni).
Tessy will sooner or later realise her fate (shes had it too good lately -
Princess Title, 2 Royal Meal Tickets, connection/access to $$$$ clothes, and trying to make up for it by dressing up as someone twice her age),
as soon as Louis gets bored with the quiet, responsible domestic life.
She certainly loves her royal life, the clothes, the hair stylitsts, the gala events, being set up for life - Reminds me of Mares, the Luxembourg equivalent of a Bogan 
.
Louis's midlife crisis will come on realising that he never got the chance to sow his wild oats, and
will follow Uncle Jean and divorce Tessy, and marry a minor aristocrat.
Wonder how her father's taking all of this?Tessy being a daughter of a republican tiler, attending a
technical high school, so in fact in the educational stakes Tessy hit it big by getting herself preggers because apprantly shes now in America attending a univeristy or something like that, that
she could never achieve academically (based on merit by) herself back home.Apparently Tessy's father was the head of a republican political group or something, would be very awkward for the Left to have as one of its head the grandfather of the grandchildren of GD Henri.
Probably has steped down, fired, by now.
**PS -
I really hate Hello Magazine and their sugar tainted stories about royals ESP About Tessy being a 'respectable', 'upper middle-class' girl, being an assest to the GD Family.
Word is that Amedeo is already living with his Italian aristocrat gf (probably has no spine like the rest of the men in the Belgium family, no surprise there
) - Following grandpapa King Albert with his women
