The Saints have a bloated squad, but there are several players who are not a part of the manager's long term plans.
However, Hasenhuttl believes that several moves will happen in the coming weeks, allowing his 23-man league squad to take shape.
He said to reporters: "I think in the next two weeks the transfer rumours will turn to facts because the clubs are now forced to do something.
"Every team wants to change a few players and bring new players in.
"I am sure the squad we see today is not the squad we will see on the first game day for sure, and every change we make let's have a look.
"We have more time and I am sure we will have one or the other transfers."