AA to SPI
I haven't heard of any other really "big" names moving, but there's some more shuffling coming. Someone that won a major in the last couple years is also going to SPI, don't want to spoil something that isn't out there yet, though i'm sure people know if I do.
https://www.pba.com/2024/november/introducing-pba-elite-league-battle-brands"EQUIPMENT
During the regular season, players will be able to use any product-registered bowling ball available to them. For example, Roto Grip players can throw Storm and 900 Global equipment; Hammer players can throw Brunswick, Ebonite, Track, DV8, Radical and Columbia 300 equipment.
In the PBA Elite League: Battle of the Brands Championship, however, players will be limited to their single brand’s equipment. To continue the previous example, Roto Grip players will only be able to throw Roto Grip equipment in the finals — not Storm or 900 Global.
Furthermore, since not all brands produce a urethane bowling ball, no player may use urethane equipment during finals matches. The tournament director may grant an exception for equipment used exclusively for spares."