I'm not very optimistic on this. From what I've read it would be impossible for Swgemu code to be used in other emulators and vice versa.
If this is merely a post inquiring about a group hug then great, but I don't see the projects moving further at a faster pace because of it. Years have been put into each project and it will be difficult to talk anyone into giving up on their project.
Hopefully I'm wrong because I would like to play SWG again before I die