Wasn't this MMO cancelled at one point? Guess it’s back.

I need someone to explain why an MMO?

Look at their last attempt. MMOs are a notoriously hard market to capture, and a limited market. You have to be at the fucking top to pull in a healthy set of people as their first MMO. On top of that, your core playerbase who would be quickly attracted have already invested months to decades in their current thing.