How will GTA 6's online mode look like?

 it's quite likely that it will resemble GTA Online.

 If that's the case, the developer must exercise extraordinary caution while implementing this new game mode.

 Rather of making gamers restart from scratch like in Call of Duty or Battlefield, 

Rockstar should aim to make the transition as smooth as possible. 

Players might not have much incentive

to upgrade if they are required to remove all of their material.