Re stallions for Bella Rose - I have ideas on what I would do but I don’t trust myself so I would pick the brains of much more knowledgeable folks.
As someone mentioned, she isn’t a spring chicken anymore and I don’t believe she has ever been bred so it remains to be seen if she can catch and hold a pregnancy. Of course they may try embryo transfer so they can get as many foals out of her as possible (Isabell’s other mare, Weihegold, has produced over a dozen offspring by embryo transfer). But that route can be iffy, too - not every embryo will take in the recipient mare. And because of Bella’s age, frozen semen may not be an option so they won’t be able to use deceased big guns like Gribaldi or Negro or Jazz or Donnerhall/Don Schufro/De Niro (these three D-line stallions don’t have super reliable frozen semen anyway).
As I said she is such an open book pedigree-wise, there are many options for her. And she will no doubt get free stud offers from danged near every stallion owner in Europe. It will be really interesting to see who Isabell and Madeleine decide on for her - will they stick to only German stallions or will they venture to KWPN or DWB?