I’m so sorry for your loss, and so glad you could find a nurse mare. I hope the transition goes well.
I cannot imagine that they won’t let you buy the foal, in which case you have lots of great options to choose from.
If the foal does get sold/placed by them, I’d pay attention to how and where the foals are marketed as well as color. People might be excited by a colored WB cross or a colored stock horse and might not be as interested in a colored pony foal.
If I had control over how the foal would be marketed and trained, and felt the mare was ‘ordinary’ - ie not up to producing a great sport horse on her own crossed to a WB - I’d probably suggest crossing out to the welsh or a Connemara. The Welsh gives you better guarantee to stay pony size; the Connemara cross is pretty sellable regardless of final size. Either would probably produce a very useful, sellable animal to you, but if the nurse mare group didn’t market them properly, the right buyers might not think to look for them there and they might languish.
I think the only double dilute Connemara stallion around at the moment is Fiontar Mac Tire. There are lots of nice single dilutes around, which might be worth the risk if you were going to control the foal.
