I don't know Coomer. I did a search for a "celica wagon concept" and this seems to be where it originated:
http://www.stationwagon.com/gallery/1999_T...ca_concept.htmlSomehow I doubt it was actually a concept. Look at the rear A-pillar, its taken directly from the hatchback, and the roof isn't quite straight either. Besides, why would they even consider making a Celica wagon? It makes no sense.
edit: I was bored so I corrected the image
the roof is now level, and the windows/roofline were worked as well