Rebellion Pre-Orders: How do they work now?

I had pre-ordered Rebellion but my credit card changed and the old one is invalid now. (note recent change to Impulse pre-order charge policy now.) So I've tried to pre-order Rebellion again but cannot check it out because of the recent split with Impulse and Stardock.

So what now? Are Trinity owners going to be able to get a discount on Rebellion? Will Rebellion be in my Impulse account if I do?