Is there gonna be a scenario editor
Once the player has reached the end and reached the Ascension Stage, creative tools are unlocked, allowing them to mess about and use it to create their own scenarios and stuff.
Smaller questions like these are more suited for the Quick Question Thread though.
Depends on what do you mean by “scenario editor”. If you mean something like a custom campaign in some games where there is a fully featured editor for making them, the answer is that it’s unlikely. If you mean sharing planet settings with other players to see who can survive the best, then that’s definitely something that will get added.