I think the leaked playfield is going to be very close to the actual final product. You can see the lanes blurry behind his head and you can also see the handle of his sword which I am assuming is still the ramp from the leaked image. I hope more is added but that loop to ramp shot to the right of the drops looks kind of cool.

That is possible but there is also the possibility that they delayed the release of Iron Maiden because GotG was not selling well and they wanted more sales. They may have figured that GotG would really tank if they released Iron Maiden sooner so gave it more time to sell.

You would be surprised. Do you really think Stern was making no money during the period GotG was released? They have other titles they are selling. They are still making money.

If they were not selling well enough the only reason for them to bring Iron Maiden out early would be if they were in trouble which they weren't. I still think they wanted to give GotG more time and did not feel the need to bring Iron Maiden out.

Whatever the case is if you think they were "making no money" you are very wrong.