Get 10 million in per season for naming rights and we almost double what we were getting beforehand. Misci sponsorship will also go up if the stadium is seen to one of the best around. (Unlike WHAM) The corporate side alone would prob give another 5 million. As others have said Goodison is a bit cramped to spend any length of time in, the new stadium might be a place you would go to an hour before kick off and the fan plaza has the ability to generate far more in income too for us.
We will never be matching the clubs above us but we can close the gap a bit, the club seems on the up, it boosts things like shirt sponsorship, players/managers wanting to come to us. It can't all be quantified in numbers, it brings more than that.