Oroku Saki stood on a mat above a concrete floor, without his armor. The room was filled with incense, and behind him stood a large flag with the foot clan insignia. He was practicing Tai chi. He was at ease, alert but very calm. Suddenly, he sensed a presence behind him. One of his foot ninjas had tried to get his attention by tapping on his shoulder. But before he could, the Shredder grabbed his arm and threw him in front of him. 

The ninja should have known better than to actually try to touch Master Shredder. Any attempt to touch him would be considered an attempt on his life at the Shredder's discretion. The Ninja got up, and did a bow before Oroku Saki.

The Shredder didn't bow back, instead continuing to go about his tai chi, and ignoring the presence of his underling.
The ninja said "Master Shredder. Gotham City? There's a man who goes by the alias of the Joker. He seems to have a supply of chemical weaponry we'd like access to."

At first, Saki wasn't phased by the information. After a few seconds he spoke. He said "Very well. Send a few Ninjas to...speak to this man and bring back the chemical weapons. Also, in New York...this SpiderMan? I would very much like to meet him."