I think so, yes.
Hopefully others with more experience can share too...
From what I understand, Anejos are predictably released twice per year- around Father's day and again before Christmas.
The Opus and variants? No idea if there is any rhyme or reason to their release
I do know that they go to certain stores (Fuente accounts), and different accounts get more (or less) depending on sales.
Another "thing" (that I think is kinda gross) is that some stores put them out "for sale" just like any other product. Other stores hoard them, slow-drip them into stock, charge extra, or keep them aside for the "cool kids."