If Hitachi was chosen to build new monorails, (just a thought) would they change the design/framework from their current monorails? I don't know if it's just me but Hitachi's monorails seem a little bit too... "boxy." They seem neither futuristic nor sleek to me.
Whoever builds them (if this goes through at all) is most likely going to just be the contractor, working off a WDI design.