FYI....You may have to chase Marriott Rewards to get a status conversion from Delta Privileges

With absolutely no communication from Delta Hotels in regards to my Delta Privileges account I ended up chasing an answer on what happens to my status within Marriott Rewards. Bounced around a bit by Delta then finally after a few emails to helpful MR people I was fixed up. MR upgraded my existing no status MR account to MR Platinum from my Delta Platinum level.

Not the best merger into a new program but worked out in the end. So unless Delta or MR advised you already on a status match I'd chase MR and send along an image of your Delta Privileges card.