Check out what Istvan Jumpgate Evolution developer has to say about this topic in his Development bulletin 4#: Capital Ships
Since various interviews, dev chats, and columns on gaming sites have now either hinted about or openly mentioned this topic, I think it will no longer come as a surprise to anyone that the development team has plans to put capital ships in JGE. Scorch had wanted capital ships even "back in the day", but development resources were so thin for JGC post-release that such a large project was never tackled. JGE's AI system, though, is the real factor that allowed us to realize that we could indeed put capital ships into the game...
Read more about it Here in SWAT forums¡¡