The Welsh tactician surprisingly left his post as Cottagers boss during the week but Hangeland, although taken aback, says that life must go on despite the fact the club has lost a top manager.
"I was pretty sure that he was going to stay," said Hangeland. "Now we will have a new manager and that will be exciting.
"(I had) a really good relationship with him. He came in with a new philosophy that demanded a lot from many, me included.
"It became better and better and we had an okay season. But now we must start again with a blank piece of paper."