I think it's better to make the introduction in Construct2. You can make a slideshow with separate sprites and animations. I usually create animations in Illustrator and Photoshop. To finish, use fade effects using the behaviour to make the transitions. I think this way you have more control over the outcome and is a more flexible solution, because everything is resolved by code. Do something clean and fast, since the game is the main content.
PS: Don't apologize for your English.