I think you might need the marriage cert and spouse passport copy because the form does ask for those details. I am single so it wasn't applicable to me. I'd say better be safe than sorry and upload them anywayAwesome!
Just to confirm the documents that need to be uploaded:
-> Current Passport - Canadian PP + Citizenship certificate
-> Indian Origin Proof - Indian PP + Surrender certificate
-> Employment letter
(Applying only for me (spouse is still a PR), so I guess marriage certificate & spouse passport copy is not needed, am I right? )
Thank you for the update @americanidiot