OK well seems I started a lot of discussion which wasn't anticipated to be honest...
Well It would be a shame if they didn't do any prequel stuff but..as i read the comments here, it seems unlikely if they would do so.
Probably the biggest "troubleshooter" is going to be Disney. Yes Disney. They just licensed the Star Wars licence from Lucas and they are focusing on Episode 7 (please, don't make it too kiddy!). So in that concept, if I were them, I wouldn't be agreeying to bring stuff out prequel to Episode 4. All the focus needs to be targetted to Episodes 4-6 so that Episodes 7 is hot at the moment.
Do I agree with that? No but it seems the Clone War stuff isn't going make it to the board game..which is an awfull shame.
One last note on that: i really hope they bring out Boba Fett, cos honestly, that's the villain I miss in the core and ally packs!