"Supergirl" kicked off The CW crossover with its "Medusa" episode. Facebook/Supergirl on the CW

"Supergirl" season 2 ended with a heart-wrenching finale when Mon-El (Chris Wood) was forced to leave Earth following the release of a deadly toxin affecting all Daxamites. Season 3 could still see some of him, hinting at occasional appearances. However, another cast member may be following his lead.

Spoilers for the season 2 finale are included below. The show aired on The CW in the US, on Foxtel in Australia.

Maggie Sawyer toning down

However, Mon-El may not be the only one appearing on an as-needed basis. According to TV Line, Maggie Sawyer (Floriana Lima) will be stepping down as a regular and appear only when showrunners need her.

Unlike Mon-El's, the impact of Maggie's departure may not be as much. For the benefit of those who are not aware, Maggie was the love interest of Alex Danvers (Chyler Leigh) in season 2. Both went steady for the most part of the season – including rough ends where they had the usual quarrels couples would have.

But it seems that the decision to demote Lima’s role was entirely due to her career outlook. She was apparently looking to pursue other opportunities, and such put a damper whenever producers needed her on set.

How will it affect potential 'Maggie-Alex' marriage?

Looking ahead, there are other serious things to consider. In the season finale of "Supergirl," Alex asked Maggie to marry her. There was no definitive answer, with Maggie simply smiling and hugging Alex in the end.

If both would get married, it would be a bit tricky. A possible twist could see them tie the knot with Maggie being re-assigned to another place. With a potential long-distance relationship, showrunners could use that as an angle, which would affect the focus of Alex and her work.

On the other hand, both may not get hitched since the re-assignment angle is still in play. Ending the relationship could be possible, with Maggie appearing once in a while due to threats or other special occasions.

New love interest for Alex?

There is also the possibility of inserting a new character in the mix, someone who would take the place of Maggie. While the same-sex marriage thing worked, producers could explore other options, including the possible insertion of a male fling.

Right now, only the producers may have an inkling of what to do with the situation, though changes abound. New threats are expected in season 3, and most fans already saw some of them. These include General Zod (Mark Gibbon) and Reign the Worldkiller, one of Supergirl's first enemies in the New 52, according to IGN.

There are obviously more things to expect on “Supergirl” season 3. Fans will have to wait until October to find out.