God's Chosen Warriors

Full title was intended to be "The Platypi: God's Chosen Warriors."
Based on 's theory that it was not man, but rather the platypus that was chosen to inherit the Earth. Humans rule the surface, suspecting nothing of the humble platypi. However, the platypi we see are merely scouts gathering information. The true platypi have become superevolved and grown to enormous sizes. They are capable of destroying cities, but are biding their time until the invasion.
This was inspired by a conversation that occured while I was watching in on a DnD session, because I thought it was awesome.