Awe man, you spoilt it for me!
You really do have to wonder why it was such a secret. The only reason I can think of is that it gave Dave more airtime. People kept asking, people kept reporting, each time Dave got media time, or at least the band did. There doesn't seem to be any other reason why holding such information matters.
Dave's cameo prices have gone up, Dave's pushing NFT's, Dave's throwing everything he can at publicity, I think this is him just dragging shit out to try and get to news like tours and albums.
Speaking of cameo if you want Mustaine to talk to your corporation, business, anything more than a personal hello, the dude wants $2500!!