Lolz being a developer I can think of many ways why this blue image appeared instead of the teaser one.
Most likely i can think of is that the developer who are making the Yaris page have made it public or during testing by mistake. So my assumption is that this blue image page is going to be the one made public when launched.
This is getting really funny at least from this thread it seems the Yaris is getting very anticipated launch and getting good traction even before launch.
