I'd say, go and listen.

If it's truly a blindside, know that they cannot change your child's placement without your permission, and if they are making requests of any kind in the meeting, you don't have to say yes to anything you don't want. You are part of the school team for your child.

But it may just be that your child is complex and they want to show you all the perspectives. Conferences ARE complex when your child is 2E. Better to know than not, even when it's hard on you.