People need to stop putting the idea in their head that the game is ending just cause it says v1.0, this was such a crazy case even before this update due to a silly rumor; that W.W actually had to break it down in retard terms at the end message of an update. As if the story has been pointing that direction in the first place...
I'd wager we are at the half way mark, it will only be up for debate if we get to Lvl 4, as there is a chance we can take the serum and skip all the growth sooner rather than later. But that's only if W.W decides to take that route.
We have to take down Cole & S.I.N, I'd assume the climax of that would be our 4th Evolution. Then our 5th is kinda up for debate, it could be taking down H.E.R.O, Ella, or the Monster threat at their rifts.
Either way there could be an even BIGGER push into the MC's potential to go beyond Lvl 5, in which we may be the one to save the world against the monster invasion or something like that.
AAnd those are all just my guesses for the MAIN Arc, excluding the smaller ones like the Twin Arc, chill updates, etc.