Amyk

The Dubai Police Certificate is emailed to you and you can take a print out of it for the interview. That's what I did and it's accepted.

https://travel.state.gov/content/dam/visas/iv-dv-supplemental/ABD_Abu-Dhabi.pdfGo thru this pdf. It also has the interview checklist. 
You must get all documents mentioned in the checklist , also photos as evidence of relationship.

they're unrelated, but when you move your sponsor will need to cancel the uae visa.

No the residence visa doesn’t get cancelled but when you do travel you cancel it. 

Only one thing is missing -Proof of your us petitioners domicile ( photocopy of your husbands passport) 
-for proof of relationship, you can also keep a copy of his visits, Gifts and money sent to you. 
-also after registering for your interview, you need to print the page and bring it along with other documents. 
-also print and keep the checklist, so that you are sure you brought everything required. 
Do go thru pdf sent by wanderlust. 

My interview is on march 18 alhumdulillah! 

Yes we will have our appointments scheduled soon. Hopefully before 2018!