Just from observation for reference.

The on-fire status ‘Excited about the arrival of TE2020’ is exactly the stated event effect gained by one of the first 11 when another player gains a on-fire status, such as from scoring a hat-trick or providing 3 assists in any competitive game. My right back gained this status after my top scorer providing 3 assists in today’s only league game (very obvious as defenders hardly score or assist a lot, and he hasn’t reached a new star either).