I can't imagine they'll have it anywhere close by December. That'd be cool, but with what they're still working on tweaking in SC's PTU, I cannot imagine there's a level of polish with the game to finish SQ42 with how much they share. I haven't been following development of either too closely, and still need to download 3.3 to see what its about. I believe that's the version that was recently released for the PTU?
Regardless, as said above it'll be released when ready. But it's good to see something...now let's get some actual hands-on testing and streaming of actual gameplay for SQ42. Frankly, with the current status of SC, I feel SQ42 is still a ways off from being released. Time will surely tell.
I did back the game, and the idea of the game. I didn't invest tons of money, but still believe there's a product that will be released here. I don't even necessarily want them to try to keep every promise they can...but I don't want the bugged product out today to be pushed release to please the impatient until they realize what it really is.
That being said, been playing a lot of Void Destroyer 2 and getting back into Elite Dangerous lately. I've got time to wait to see if my investment flourishes into a game or stays a pipe dream.