I was unaware of there being 2 different wikis. The one I was using did not point out a bug that the other wiki pointed out.
I was completing the mission, closed all portals, capped the shrines, and killed Lich and Shiro and nothing happened. We just stood there in the temple. I even wandered back thru the entire mission and killed every living thing in it. Twice.
Turns out, I was sending heros into the shrines a little too early. Apparently, one has to "trigger" a dialog before sending in the troops.
Mission accomplished. Thank you anyway.