Corrected entry: The whole plot of the movie is premised on the fact that it has been 14 years since the last release with the movie "catching us up" on what has happened the last 14 years. The big problem is that none of the Incredibles have aged. "Dash" and Violet Parr (the kids) should be 20-something adults possibly with their own kids and Bob and Helen Parr (The parents) would be middle-aged grandparents.
Corrected entry: Bob got a call that Helen was in danger so he called Lucius to watch the kids at the house. Void and the other screen-enslaved supers arrived and Lucius closed the door and then fought them before they got goggles on him. There was no way Lucius knew they were a danger to the kids. Bob didn't know either, and didn't know Evelyn or the goggles were bad.
Corrected entry: The baby can change into a demon and other things in the first movie, but that is forgotten in the second, along with the fact that he has powers, and he can now shoot lasers, and also turn into flame. (00:45:00)