I'd be happy with a DFW style building and reskinned JW safari trucks. Alternatively, base it off the JP tour but no electric rail and just reuse the dfw ranger vehicles would fit the theme.I like the idea, something to add visual variety.
Also, the DFW assets lack a tour building, which I think would suck for missions that request tours and to make an attraction to bring in the adventurous guests. If that gets in then I am all in for different building sets for challenge mode.