Scenarios made in AoE can be played in AoK! I just tested it because I read Mia's post. It really does work! Depending on what units you place in the AoE scenarios, you can get the AoK-equivalant. Many don't transfer over directly, for example a tree turned into a wall section. I think this happens because the AoE SLP file's # has different content than the AoK SLP # referenced in the Savegame file. Therefore, AoK diplays the SLP that matches the number, not the contents.
Be careful, if your AoE scenarios have to many units or have unrecogized SLP #s in them, the game will crash. (I am 90% sure about this. But I do know it sometimes crashes.)
To get special beta units/objects etc, all you have to do is place units in AoE, then open it in AoK and see what you get.
Here is an example of some things you can get(This is from Hope you liked this post, AoErat ------------------
"Do not use a hatchet to remove a fly from a friends forehead"-famous Chinese philosopher