Looking forward to PoE1 league. Somehow I doubt it will be a "one month" thing, but I suspect they've done that because they have a rough expectation that 0.2.0 will be coming out one month after league start and want the maximum amount of attention for that release as possible. Will be super lame if they have 16 new ascendancies and you only get four weeks to play around with them though - in any case I'm excited about what craziness will come out of build crafting after the previews they've shown so far.