Exactly what the title says.
Name series that only lasted 6 - ish issues that you liked and thought deserved a longer run. Can be a team, known character or new character.
I’ll start with Doorway To Nightmare - Madame Xanadu was a good character. Sure she had a Vertigo series years later but I was sorry to see her first series go by the wayside.
Also, The Stalker. Drawn by Ditko. It was a different take on sword and sorcery adventure.