Any data points on chances for a FB Platinum member to get a bulkhead Comfort+ seat on DL flights JFK-GRU and GRU-ATL in Y (fare classes V and U)? I will be on them May 15 and June 13.

AMS-JFK and ATL-AMS segments will be on KL and I got the wanted bulkhead KL Economy Comfort seats on those.

Any suggestions as to which alternative preferred seats I should reserve until any potential Comfort+ seats become available?

EDIT: In the meantime, I have made the outbound journey and I can tell you, that there is not only very little chance to preselect a DL Comfort+ seat but even SkyPriority boarding is quite a dissappoinment. I got to board after preboarding of parents with infants & disabled passengers, mactive ilitary servicemen, SM Medaillon, etc. so I basically boarded just before general boarding.

At the Sky Club the scanner flagged both my paper and electronic boarding passes. The DL concierge asked me whether I have an American Express Platinum card, because without it I would be denied entrance. When Iinsisted I should have access because I have SkyTeam Elite Plus status, he looked at me as if he had no idea what I was talking about and apologies profusely that he had to turn me away. I said I wantged to speak to a supervisor and he then looked in his system and seemed confused, but stuck to his guns.

When I clearly was getting agitated, he asked me with which airline I supposed to have status. I said, I am ST Elite Plus because of my Flying Blue Platinum status. He asked again which airline and I answered KLM. That's when he understood the situation and checked my boarding passes again asked for my FB Platinum card or number and allowed me into the lounge where the Coca Cola machine has pride of place right next to the bar and ''Starbucks' coffee machines were banished to opposite ends of the lounge.