Hmm... Well...
You sound very vague at this point. Do you just want to add some new stuff in, like a content pack? There are tons of those around, ranging from simple animations made in ParticleForge, to packs with 9 new Cap ships (7 Deadly Sins, methinks), If you know yourself as a modder, perhaps you could try helping them out first.
But it's your decision. Modding by yourself is a tough endeavor. Being as vague as this doesn't help attract people to it.
