EXO members hinting at a possible comeback?

On August 18th, a post on Instiz compiled pictures of EXO members that fans think may hint at an upcoming comeback. Originally titled, “Recent hand gestures of EXO members and what it may mean” the post features several members portraying the same hand gesture over multiple performances.
August 14th

Suho

August 15th

Baekhyun, Chen & Xiumin

1. Baekhyun does the 3 hand gesture
2. Xiumin see him and copies him right away
3. Chen acts surprised and says something
4. Baekhyun whispers something to him
5. Chen laughs and copies them