I’ve seen some rumors online about 2020 Potter releases, in summary:

75966 Room of Requirement 20-25 USD

75967 Forbidden Forest (Umbridge/Grawp Scene) 30-35 USD

75968 Privet Drive 70-80 USD

75969 Astronomy Tower 100-110 USD

????? D2C Unknown, likely Diagon Alley

These seem realistic, and follow their pattern of 2 movies per year, with these releases following the 5th/6th movies. Unfortunately, nothing about a ministry of Magic, Prophecy room, or locket cave, which I have wanted for a long time. I was also hoping the D2C would be Hogsmeade, but I knew that was highly unlikely from the start 

5 minutes ago, Darth_Raichu said:

Wait, you have their phone# ?  I have to open ticket to fix any problem and wait for the 30% chance they contact me back

Maybe I've just always been lucky?  But yes, I've never had an issue on the phone.

19 hours ago, Lordoflego said:

^ old seal codes and you find amazon listing by scanning barcode, I didn’t get any results by typing Lego + set number either 

Easiest way I've found is to let Google find it.  "Amazon lego + set number" (quotes not needed) will usually return the listing.