The idea of a season crate bases on the crates materials being different, iron and lead are still available but bronze, silver, gold and cobalt would have different counterparts.
Examples, Gem Cases are all about jewels
Rock: Dark, striped, battle warn, gravely textured weapons and armor.
Emerald, glossy green weapons and armor.
Pearl: Pure white weapons, glossing shinying armor, like a holographic playing card.
Ruby: High class blue needs a high class red.
Splash Damage Cases
RAD: Deep blue and orange (Anyone remember Nerf skins) Rad soldiers
Moloch: white red, black and skulls, Tempo
SeC: Chrome and green/blue, Brink
CDA: Playing clean, white, yellow and black.
“Default?”: like fancy augmentations, don’t like fancy skins, try “Default?”
Cross merc, like the default appearance of someone else, dress like them! : Available in, Blue Pineapple, Concussion Green, Grenade Red, Bullethose Grey, Turret Buddy Orange, Proximity Orange, Sticky Khaki, Tortoise Grey, Smokey Red, Ghostly White, Heartbeat Blue, Aiming Orange, Firebird Blue, Shocking Red, H.Station Grey, Sawing Scrubs, Airstrike Drab, Kawaii Laser, Burning Orange, Artillery Baby Blue and much much more.
The cracking of Obsidian: An event where early beta and open beta players can commune in having obsidian loadouts, winning a few games with an early beta player grants an open beta player an obsidian card, but just one, every couple of dozens of wins early beta players supporting their team grants them an obsidian merc until they collect all 5.