If you’re afraid this game won’t make it to steam, based on Nexon’s history you can probably be certain it definitely will.
All these nexon published games had steam releases:
mabinogi
vindictus
maplestory
combat arms
dragon nest
atlantica online
The only thing I am curious about is whether they will take advantage of steam’s Early Access.
Early Access is clearly a double edged sword on Steam. Lots of people don’t like seeing F2Ps selling access to an unfinished product. On the other hand, if you just open the floodgates, the servers will be over-burdened and people will utterly hate your game for a very irrational reason and the turds on the internet create a bad reputation and spam forums because they have nothing better to do (I assume). So I don’t think posting open beta on steam would be a good idea, unless there are like a crazy amount of excessive servers ready to handle extra loads. Even bad games when launched on steam often get over-burdened simply because they are f2p.
But the positives of early access is that if done successfully, it can help build a lot of momentum and hype imo. It gets people making content earlier like reviews and first impressions and starts creating a real presence on user created media sites like twitch and youtube.