If you know you are going to encounter obstacles why not take the time to address them before you begin.
Using software development as an example, when making a presentation one thing you can always count on is the question of “is this safe and secure?”. Rather than waiting for the question to be asked, explain why it’s safe and secure early on and get it out of your way early.
If you address the issues early it allows people to look at things with an open mind. If you let the issues fester, there is a good chance an open mind will never get the opportunity to consider the real possibility.
Have a great day!