First.... [welcome] to the FOG.
To answer your question...no one would know, and if they DID know, it wouldn't be announced until just before the sale starts. That being said, the likelihood of a Domino sale is very very UN-likely.
You might also consider that the price of virtually ALL Festool products will be increasing on April 1st...so there is a case to be made that they are on sale NOW....at least for a few more days!
Cheers,
Frank