I was thinking of a hero balloon,
It could be called the General Blimp, Grand Zepellin, Grand Blimp, Grand Balloon, I don't know you could make up a better name.
This is a hero that like the others can spawn troops and can increase every 5 levels. The grand blimp or whatever has an ability called the Royal Bombardment, it heals the flying hero and the blimp releases a big bomb that does devastating damage, but in a very small area, maybe 2x2 or 3x3 it also it spawns a number of those flying skeletons like those from the flying skeleton trap, but they don't attack with swords, they attack with small bombs with small area splash, also they have slightly higher HP and DPS compared to the normal skeletons. And have a speed of 20 while the grand blimp has a speed of 10 like the regular balloons, since the heroes speed stat have been the same as the original. It may be op (I think) but it would be nice.