Victory Cues are the new upgradable cues. You will find among them some of the "old" Standard Cues and all the Premium Cues. Upgrading cues will allow them to level up and, with each level up, you will be increasing the stats of the cue: Force, Aim, Spin or Time.
Each time you open a victory box you will receive cue pieces inside and, as soon as you gather enough pieces for an upgrade, you will be able to do so. All Victory Cues will start at level 1 and you can then upgrade them. Upgrading them will also award XP.
Keep in mind that Collection Cues' pieces (legendary/rare/epic) aren't retroactive - if you received a specific piece more than once, they will not be credited after the update.