A tweet from Rockstar Games has the full official response to yesterday's leak of a trove of Grand Theft Auto VI footage. Word is development of the open-world crime sequel will continue as before:

We recently suffered a network intrusion in which an unauthorized third party illegally accessed and downloaded confidential information from our systems, including early development footage for the next Grand Theft Auto. At this time we do not anticipate any disruption to our live game services nor any long-term effect on the development of our ongoing project.

We are extremely disappointed to have any details of our next game shared with you all in this way. Our work on the next Grand Theft Auto game will continue as planned and we remain as committed as ever to delivering an experience to you, our players, that truly exceeds your expectations. We will update everyone again soon and, of course, will properly introduce you to this next game when it's ready. We want to thank everyone for their ongoing support through this situation.