Publisher Leung Tin-wai is expected to make a statement to the police in the next few days as his health improves after the attack in which his left forearm was severed two weeks ago.
Colleagues of Leung said he could speak fluently and had already been giving orders to staff on his magazine, Surprise Weekly.
Leung, in the orthopaedic ward at the Pamela Youde Eastern Hospital, gave a brief interview to police last week, but was still not strong enough to give a formal statement, officers said.
Senior superintendent Trevor Oakes said: 'We were able to talk to him briefly, but it is not sufficiently detailed to help in the case. It is very difficult [to get a statement] because he is still under medication.' Police are still in the process of identifying formal suspects.
A Pamela Youde spokesman said Leung's condition had remained satisfactory and stable.
Tsui Siu-wa, associate publisher of Surprise Weekly, said none of the 15 editorial staff had been threatened after the incident and no one had resigned.