I just realized the whole Lunarian fire thing and now I have some thoughts about THAT big bag of possibilities.
[All] This Doesn't Make Sense But Because It's One Piece...Flaming Lasers? Superheated Lasers?
[S-Bear] High Speed Fire Blasts, High Speed "Magma" Blasts, Scorching Hot Air Attacks?
[S-Hawk] Fire-Coated Sword, "Magma"-Coated Sword, Fire-Coated Body Blades, Fiery Wind Slashes
[S-Snake] Fire Arrows, "Love" Flames
[S-Shark] He Could Liquify Flammable Materials And Set Them Ablaze As He Uses His Fish-Man Karate, Scorching Hot Water Karate, Steam Attacks
[S-Flamingo] Flaming Strings (iirc doffy can already do this but eh), Flaming String Clones, Flaming Bindings, Flaming Parasite String, Smoke Traps, Internal Cauterization, Flaming String Armor, Crucifixions, Fire Walls
[S-Crocodile] Flaming Hot Hormones uwu :3 / Scorching Hot Sand, Glass-Making (illogical but this is one piece) / Fire Hook / The Mucus From The Mucus Fruit Is Highly Flammable And Even Explodes / Extremely Hot Melted Wax / Clay Hardening, Clay Explosions / Fire And Poison Is A Deadly Combo Independent Of Any Special Synthesis But Perhaps Some Of The Many Acidic Poisons That The Venom Fruit Can Produce Are Highly Flammable And S-Croc Could Even Use His Fire To Blast The Poisons Out Long Distances.
[S-Gecko] Uhh....Besides Coating His Shadow Constructs (like the brick bats) In Flames, If That'd Even Be Possible, I Got Nothin'.
I don't think Oda will do any of this, but it's still neat to think about.