it is us that everyone expects us to have the mission won.
But this one seems to work, at least from a grammatical point of view.
it is us that everyone expects to have the mission won.
I'm wondering why it still wouldn't work either.
Then, let me ask this way.
Why wouldn't it work as a cleft sentence like these? What is the difference?
It was George who/that arrived first at the meeting.
It was English that George studied at Oxford.
It's you that I need.
It is us (though some would argue "we" is better) that (though some might argue "who") everyone expects to win.
Everyone expects that we will win.
Eveyone expects us to win.
It is we who are are expected (by everyone) to win.
It is we/us expected to have won by now.
Those all work, more or less. The original simply did not.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
'... to have the mission won' is the main problem. I really have no idea what it is supposed to mean. Even if we try something new: It is us that everyone expects to win the mission, which looks better grammatically, I still don't know what it is supposed to mean.
Visit here and read the article under the title 'Production run. Space Battleship Yamato', if you have time.
Space Battleship Yamato - Wikipedia, the free encyclopedia
You can get the idea what mission they have.