The CW has certainly been busy since Arrow debuted in 2012, gathering a multitude of heroes from all corners of the DC universe and even pulling in DC characters from other networks. The latest acquisition is Supergirl, which has moved from its former home on CBS to join Oliver Queen, Barry Allen, the Legends of Tomorrow and everyone else in the ever-growing Arrowverse.

Now, the Girl of Steel (Melissa Benoist) gets the closest thing to a hazing that lovable characters like Barry Allen (Grant Gustin) and Cisco Ramon (Carlos Valdes) can organize in Superhero Fight Club 2.0, a follow-up to last year's CW superhero/supervillain group promo, which went down very well with fans and is back by popular demand. Ostensibly a way for all of The CW's superheroes to train together (but mostly just a way to have fun and promote the returning shows), Superhero Fight Club 2.0 pits Supergirl and her new friends against a variety of new challenges, chosen by Cisco and Felicity Smoak (Emily Bett Rickards).

If nothing else, Superhero Fight Club 2.0 is a good way to remind everyone that The CW's superhero series are coming back in full force, starting this week with the season 3 premiere of The Flash and the season 5 premiere of Arrow, then followed next week by Supergirl and Legends of Tomorrow both returning for their second seasons. Crossover events to look forward to include a musical crossover episode between The Flash and Supergirl, and a massive crossover of the four series across three episodes - starting on The Flash, then moving to Arrow, and then to Legends of Tomorrow.

The CW - Superhero Fight Club 2.0

The Arrowverse may not have the massive budgets of the burgeoning big screen DC Extended Universe, and even the most passionate of fans would likely agree that the quality of the various shows has gone up and down, but in the space of four years executive producers Greg Berlanti, Marc Guggenheim and Andrew Kreisberg (among various others) have built an impressively expansive superhero universe.

Supergirl will also be adding an impressive new name to The CW's roster of superheroes, as Superman (Tyler Hoechlin) drops in to see his cousin in the opening episodes of season 2. At the rate The CW is collecting famous faces from the pages of DC Comics, they're probably going to need a much bigger room for Superhero Fight Club 3.0.

The Flash season 3 will premiere Tuesday October 4th at 8pm on The CW, Arrow season 5 will premiere in the same timeslot on Wednesday October 5th, Supergirl season 2 on Monday October 10th, and Legends of Tomorrow season 2 on Thursday October 13th.