Custodian Guard box can be made made into normal Custodes, an HQ, or a standard bearer.
Custodes Wardens: 6+ FNP, 4 attacks, can take Castellan Axes(S+3 AP-2 D3 damage, no hit penalty)
Custodian Guard minimum unit size reduced to 3
Misericordia: knives that can be equipped by some units to gain an extra attack with a power sword profile (4 points each)
Few to none mortal wound-dealing weapons in the army
Ven. Land Raider: 2+ armor, 5+ invuln, 6+ FNP
Ven. Contemptor Dread: 2+ armor, 5+ invuln, 6+ FNP
Custodes Terminators: can be set up in teleportarium, can take spear or axe, unit size = 1-10
Termies can use grenade launchers(only the strength was mentioned: S4) to target a character by using a strategem
Bikes: an anti-flyer strategem exists(no details mentioned)
Shield-Captains: Re-roll 1's to hit aura
Valoris: 7 wounds, 3++ invuln. 250pts.
Standard bearers: no bike standards, but can be made with all the other kits
Strategems
Sentinel Storm: 2CP choose one Custodes unit, can shoot with Sentinel Blades on enemy's turn(didn't catch what phase)
Piercing Strike: 1CP choose a Custodes unit, add 1 to wound rolls with Guardian Spears
Castellan Strike: (CP cost not mentioned 1CP)Select one Custodes unit in the fight phase, improve AP of Castellan Axes to -3 till end of phase against one target unit
Unflinching: (No CP cost mentioned) buffs Overwatch
Victor of the Blood Games: (CP not mentioned)Choose a Character before game = free re-roll per turn. [ty to u/BatedSuperior5]
Shoulder the Mantle: (No CP cost mentioned)When your warlord is killed, choose another Shield Captain as your warlord(prevents Slay the Warlord)