Hi I love when the events are on to breed special monsters but it is so frustrating when you activate the breeding guardian but then get stuck because your hatchery is full. It would be great if there was a hatching guardian too.

And since the new forum was opened it has been suggested 65 times.
https://forums.socialpointgames.com/search?term=Hatchery Guardian&in=titlesposts

They have no intention of creating one as it cuts into their profits for selling gems to get people to speed up the monsters hatching.