Will twitch have invisibility or camouflage?

Title.

His stealth works kind of both ways. In one sense, he uses it as an assassin to enter a fight unseen and open up ADC damage on the enemy back line (while not being caught by the enemy assassin/front line). In this sense, it's how camouflage was described: a pre-fight positioning tool.

However in the opposite scenario, a Twitch may use his stealth as an escape tool once he's been caught out in a fight. It takes longer to activate if he's taking damage, but if he does succeed (e.g. he's being chased through his jungle) then it becomes more of a tactical tool and seems more like invisibility.

So which one will it be? I feel like Twitch should only have camouflage, in the few games I play against him he seems to wreck every late teamfight if a pink isn't thrown down. He'd be quite strong if he can't be detected in those scenarios. I'm sure all the Twitch mains are expecting invisibility though.