I've been working on a game for around a year and a half named Planetfall, in which you build a colony on a new planet.
I've bee working on it with that title since before the announcement of Age of Wonders: Planetfall. The games have some overlapping mechanics and aesthetic, but other than that it would be clear that my game is not a clone or a rip-off.
I know that I probably should change the name anyway (so there's no confusion between the titles) but I was wondering what the legal status is of a title that was in development since before the announcement of another similar title. If I decided to go ahead and not change the name, what could happen?