Some good stuff here. I don’t have any specific ideas but back when I was creating a lot of different characters, I would think about other heroes that they could be paired with or re-imagine ones from comics. Also coming up with back stories for your characters can lead to more creations. You could also create villains for your heroes and vice versa. Since you like poses, find a pose you like and create it in HM, then maybe an idea will come to you.