Info Coming on Monday May 17.

"RifftraxRules;c-17875412" wrote:

"Gordy;c-17875365" wrote:

• May 17th is the day Constantine Dragaš, of Serbia died.
  
• Who else died on May 17th? Edward Stafford, 3rd Duke of Buckingham, Welsh politician. Welsh's flag features a dragon on it.
  
• May 17th was also the birth of Welsh pirate, Bartholomew Roberts.
  
• A bit of a stretch, but it's also the birthday of Martin Delrio, Belgian occultist.
  

Notice a theme? The fall of nobles, the rise of pirates. Dragons. Medieval Game Pack, baby.

I think you're seriously reading too much into that date.

Part of my family is from Wales, and I too think that you are reading just a tab bit to much into May 17th. As far as I can tell from the tweet on this is that they are super hyped about what they plan to release over the summer and nothing more.