If I had to guess the DLC was announced this early for TCG tie ins or something. Very strange decision to announce it this early but I feel the same way I would've if it was announced 2 months from now- I'll likely wait until I deem it worth it, just like how I did it for SWSH's DLC.

Only one mega though? They should've shown at least like 3 imo since we're likely not getting any more news until release.