Mass Effect 2 crashing after finishing Kasumi mission

Well, turns out EA was able to solve my problem. I had to clear the files for Origin, then let it verify and re-download anything it needed. The steps provided by the chat agent had me delete 3 folders for Origin, then restart it in Administrator mode to recheck.

Ensure Origin is fully closed by clicking the Origin Menu and selecting Exit.
Delete the following folders:
Origin folder - Found in C:\ProgramData\
Origin folder - Found in C:\Users\%USERNAME%\AppData\Local\ 
Origin folder - Found in C:\Users\%USERNAME%\AppData\Roaming\

Once done, please relaunch your origin (run it as administrator by right clicking on origin Icon and choose run as administrator) then, login to your account and disable the Origin in-game overlay. Here are the steps:

(Origin > Application Settings > Origin In Game > Uncheck Origin In Game)
Then, once you have disabled Origin in-game overlay, kindly restart your Origin and login as administrator then, try to launch your game to see if the issue persists.

It did have to redownload the whole game (no idea why, but it worked), however I was able to pass the end screen of the mission no problem after that.

TL;DR If the -nomoviestart fix does not work for you, try forcing Origin to recheck everything by deleting its local cache.