there is a curious fact : when Predator works on a composite shaft, at the same time Longoni stops to product their composite shafts... Longoni is the leader of the carom market, and you have an idea of the weight of Predator in the pool market.
IMHO we can't exclude that it could be voluntary, because some links between both companies do exist (a strong evidence to me) . see "Molinari cues" .... swap of "know-how" against part of markets ? imho could be , they have mutual interests to protect.
Composite shafts aren't always carbon based, even they "look like" carbon... more often an composite glass and/or aramid , with epoxy resin. Carbon "sells" more, but aramid & glass do add very interesting properties in composites (as for example, glass add weight and strenght, aramid add huge strenght and resistance to friction ...)
The longoni composite carom shafts were/are excellent. really.Well known by the artistic players , especially for the composite masse shafts which are much more performant than wood for many masse shots of the artistic program ( ask to Florian Kohler if/when you meet him, he will tell you more

) ....The 5 pins/ 5 birrilli players do often use composite shafts too. Many high end 5 pins cues are in composite material , for a while. A serious game it is, when you see the €€/$$ won by the 5 pins pro in Italy ...
Could be the next sardo , that's right. But could be innovative too , we shouldn't exclude that, because there are so many possibilities offered by the composites ... patience, time will tell.
IMHO, the future is in the composites ... Who fishs with bamboo or wood today ?