As someone who has witnessed some design review meetings succeed and fail, there are some things you can do to ensure success. As @vcf3 mentioned, the attendees of the meeting have a high chance of ignoring you completely and showing up to the meeting clueless as to what you are trying to accomplish. Once you get to know these people more, you will also understand that some are more likely to knit-pick your changes and challenge you. Others will pretty much go with the flow as long as the change presents no risk to them and their department responsibilities. I am not saying these attendees should be left in the dark before the meeting but they are busy themselves and may ignore you. That is a fact. What I believe the best route is to actually go and meet with the more scrupulous members one-on-one to ensure they are on board with your changes. That way they will call you out and object in a more private scenario as opposed to in a meeting with 5-10 other people watching. This will avoid a lot of embarrassment and speed up the process at the same time.