1) Commonly abbreviated "TBA" on tickets and the like, To Be Announced is a common occurrence in sports and concerts. It simply means that a contender or act has not yet been officially announced to appear at the venue by the powers-that-be
Although similar, with a bit of overlap, this is not to be confused with "To Be Determined
" (TBD). That one implies that such an announcement cannot be made at all until certain conditions are met.
2) Apparently, To Be Announced is also the name of a relatively obscure band.
The tickets for next week's Sixers
game say To Be Announced, because the other team forfeited. I guess we'll wait and see who it is.