+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
Yes, more or less what I thought - one updated ID + the marriage certificate / proof of citizenship.

Too bad about waiting for the OHIP card but last I had to update that didn't take very long. (Don't remember exactly how long though)
Yes, at first, I thought OHIP did not have a signature, but it does haha, so I'm all set there!

And yes, they said 4-6 weeks but, I read one Reddit post that they had it within 2 weeks haha. Honestly, I don't trust it though. My marriage certificate came after 4 months, even though I thought it would take less haha