Of course it's possible I wouldn't call it a breed though, despite that one website you listed claiming that it is.
I don't think that you can really predict how the foal is going to come out when it's a cross like that. There' 3 Fresian crosses at my barn: FresianXQH, FresianXWB and FresianXMorgan.
The FresianXQH and FresianXWB look the most like a Fresian. The QH cross is huge and black and very sensible. The WB cross is a bay, very goofy. The Morgan cross is the least Fresian looking of them all, but you can definitely look at him and see there's Fresian in there. Big, black, has a somewhat huge and long neck - looks a little awkward, long back. Ultimately, how the foal comes out is going to depend on the sire/dam that created it. Two different breeders breeding the same crosses can be breeding for different qualities and end up with very different foals.