The reveal will coincide with the 25th anniversary of Rockstar as a company, so now it makes sense they opted to wait until the end of the year for this. With this year also marking an entire decade of GTAV still being the "most recent" GTA I know fans of the series will be glad that at LONG last we're finally going to see the next entry in an official capacity (the leaked footage was from in-development alpha builds dating back years, while I expect this upcoming footage will be from a beta that's close to being finished).
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