Well, despite your personal opinion, how to do you foresee a "termination option" becoming reality? ..I mean how to you see the powers-to-be suggest and support that decision?

HART board majority will decide they want to eliminate their reason for being, and forever be known for their role in a great failure - I don't think so. 
The next mayor will flip-flop and against popular opinion, try to terminate the project, and be "guy" that killed it - that would be a political suicide.
Or the governor or other legislative big shots want to be involved - generally they like to be there to take credit, not when something is going bad.
Finally, ANY support for termination would take time to build (1 or 2 year?), and each year the "sunk cost" argument is harder to overcome.
There could be 100+ people here that share your opinion, but I don't see it having ANY weight or impact. 
Sorry, Brah, I don't see any way this project is ending.

I do see a lot of pain (who has to pay) and a lot of anger.