I suggest that consider creating an adventure related to innate Warframe themes, for example pets (An Evil Possession, for example), or Syndicates in a confrontation that includes Allies and Enemies, and the Neutrals are witnesses. Or a continuation of "The Second Dream", making Stalker, the vigilante of the warframes, someone to fear.
To be honest I'm making it up as I go along. The idea is to create something for those of us who are older in the game, since Warframe has changed a lot.
I hope my suggestion makes some noise.