Nobody knows so far. And yes Trinity will get you in but does this apply if you bought the original and expansions seperately?

That sucks, I bought the GOTY of vanilla Sins and then bought the expansions on Impulse.

My understanding is that you get into the beta by pre-ordering Rebellion.  There was a discount on the pre-order if you already owned Trinity or the equivalent Sins/Entrenchment/Diplomacy set, but that offer has expired.

My understanding was having the 3 previous releases and pre-ordering rebellion was all that was required. In fact I think it mentioned on the order form the same thing, something along the lines of "Will not be charged at this time blah blah blah, you will be notified by email when the beta is open and charged at that time."

Found it.

Your order contains at least one pre-order item. You will only be charged for the items in your cart that are available at this time. Your pre-order will be saved in our system, and when the product becomes available or beta access is granted, you will be charged and notified by email.

Although that doesn't state it as clearly as I thought it did, or it was somewhere else I read it.

Edit found the Info:

Eager RTS gamers can now pre-order the upcoming Sins of a Solar Empire: Rebellion!  All pre-order customers will gain access to the Rebellion beta scheduled for later this year (your credit card will be charged at that time).

Link:https://forums.sinsofasolarempire.com/406010

i just wish they'd give us a simple answer, i love this game, so much, like, more than anything, so i want to be the first person on the beta! just wish theyd release more info!

You need to find yourself a girl, mate