Guys, they most likely won't even have anything to say, yet, at PAX. If anyone does ask all they'll say is something like "as you know Dr. Muzyka said that the team is looking at options to clarify the ending and provide more closure to our most passionate fans, and more information on that should be announced this month, but at this time we're not able to discuss this."
So don't pin your hopes on PAX. April will still have 3 more weeks left in it after PAX.
I'll also add that I'm of the opinion that Dr. Muzyka's post was a PR move to freeze the arguement for 6 weeks. The week after ME3 came out the forums were raging and any PR statement they made that were meant to be considered and discussed over days and weeks were torn apart in hours and minutes, and they needed breathing room. So, out comes one of the founders saying they hear us, they're looking at things they could do, and they'll make an announcement in April. April 30th would be about 6 weeks after that post, so from a PR standpoint they were able to step away from the hourly and daily struggle to address this issue and freeze the arguement in place for a month and a half.
My worst fear is that by April 30th the Retake movement will have fallen apart, some from people putting too much hope in PAX, some from gamers just moving on, and that by then they would be free to make no announcement, or announce that they've decided to do nothing. I also worry that on April 30th, if we're still Holding the Line, that they'll say they're struggling with a couple of great ideas and need another month, or that they've found a great compromise, and we'll see details in 6 months when they've finished it, and again once the Retake movement gives up Bioware will quietly no longer be working on that "initiative" anymore.
The only way we'll get ME3 fixed is if we Hold the Line. Just remember, no matter what Bioware announces, they haven't done anything until they've actually done something.