got a buddy that works for R&D for GM and all the H2 amounts to is a Suburban frame/D-train with new body panels on it. for some reasion GM couldn't/wouldn't try and mass produce the H1 so they changed it to fit there needs...
I think the H3 will be baised on the TrailBlazer platform, but I might be wrong on that.
My money would be on the Jeep, have you seen the turning radius on a H2???