There are a few things that we can trust will leak games early. Retailer listings, marketing material, and age ratings are probably the top three, and it's the latter that is to blame for the latest leak.
Australia's rating board has now rated something called Minecraft Story Mode: Season 2 - Episode 1: Hero in Residence. Considering the timing, we're guessing this was supposed to be announced during the upcoming E3 convention, but we'll see if Telltale push their plans forward after this.
Is this the series you wanted another season of?