I'd assume the Rat over here would cost a bit less than it did initially, but even so, 150 million euros ($160 million would be today's US equivalent) seems reasonable for what I've seen in the videos. An E-ticket it's not, but it seems like a much, much better use of resources than hardly any of WDW's recent additions (Mine Train, Frozen, Little Mermaid) and even ones on the way (looking at you, Toy Story), on top of being a solid D-Ticket with capacity to match.
If this is what's on the way to Epcot, I honestly don't see a single negative (continued cartoonification of the park aside).