Rockstar is one of the video game industry's most celebrated studios, famous for Grand Theft Auto, Red Dead Redemption, and other huge franchises. Few other developers command the same hype, and the unprecedented success of GTA V has made the long wait for GTA 6 even more painful for fans.
GTA Online was the best part of V (the campaign is just meh, especially compared to IV and San Andreas) so as long as they don’t make it too grind-y (and actually give solo players something fun to do in free mode) then I’m sure it’ll turn out fine.
Online is great. People who play online are not.