Nintendo sent out the following

 

Fire Emblem: Three Houses is a massive game that will provide thrilling and strategic content for all players. But when the turn-based tactical role-playing game launches exclusively for Nintendo Switch on July 26, it will also kick off the start of four waves of paid downloadable content, as well as various free updates, that make this already-epic adventure even deeper.
Fire Emblem: Three Houses and the Fire Emblem: Three Houses + Expansion Pass bundle are now available for pre-purchase in Nintendo eShop on Nintendo Switch. Purchasing the Expansion Pass bundle will not only grant access to all four waves of DLC as they release, but owners will also receive new Officers Academy outfits for the female and male Byleth main character on launch day.
 
The four waves of upcoming DLC, which will include engaging content like new maps, new costumes and even new playable characters, are scheduled to be released between July 26 of this year and April 30, 2020.

Will you be getting this?