Pool and Patreon exclusive (Patreon)

I'm starting to think about opening up an idea pool where you can choose what you most want to see and keep it a Patreon exclusive. What do you think about this?

For example, I plan to make a pool:
1. BBС with Mory or Elly
2. Worgen with Mory or Elly
3. Tauren with Mory or Elly

And at the end a picture with a pregnant belly