Morrison's character Will recently began dating Holly Holliday, played by guest star Gwyneth Paltrow.
However, the actor told TV Line that he does not expect the pair to be together for much longer.
"I think Holly and Will are going to take a turn for the worse," he said. "Come on, it's Gwyneth Paltrow. She lives in London, so you can only get so much of her. So yeah, this will be her last episode. But I'm hoping she gets to come back for season three. That'd be great."
Morrison also revealed that he expects the relationship between Will and Emma (Jayma Mays) to develop in future episodes.
"Toward the end of the first season, we really pushed [the Will and Emma romance]," he said. "I think the same thing is going to happen at the end of this season. We're going to see that build."
Morrison has previously admitted that he believes Will and Emma will get together in the future.
Glee airs on Tuesdays at 8/7c on Fox in the US and on Mondays at 9pm on E4 in the UK.
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