Well, there are quite a few facts to know:
- Howard's models rock. No, really, they are great and I would love to see them converted to about any engine possible.
- They have a lot of polies IIRC, and I think it would be hard to get those in the FSO engine of Saga without major problems.
- Howard wants to use his cool models in his own engine for his own mod. I wouldn't be mad at him if he refused to share his models with another mod. Every modder does that, because there will be people who play your mod because you have those awesome ships, and if you give them somebody else this exclusive coolness isn't there anymore.
- The WCS team does in fact have its own cool models, and those were done for FSO, so they work and look good in the engine. They are also well compatible with each other because often they use the same texture sets.
So if you look at the points I stated above it is rather unlikely that it will happen.
....although it would be quite cool to have Howard's Exeter or Bengal, for example...