Avid "Arrow" fans cannot wait to see what will happen next on the superheroes series. And since they are now under "mini hiatus" but soon to return on March 23, some cannot help but speculate what could be the series of events taking place.

According to IBTimes, the biggest mystery could be unveiled once the series has returned. Based on what happened to the last episode, they are claiming that another formidable villain might surface on the highly anticipated come back.

The apparent scene revealed that the superheroes finally defeated Damien Darhk as played by Neal McDonough who uses magical powers to fight Oliver Queen. However, vixen should be credited as well for helping the team by disarming the villain.

As for the next big villain, the website had guessed that Malcom Merlyn, portrayed by John Barrowman, will step up in Season 4. Additionally, "Arrow" lead star Stephen Amell who plays as Oliver Queen told Variety that it will be exciting if the Queen-Malcom battle will be set on the upcoming episodes, knowing that they are the ultimate nemesis.

"We have seen moments of uneasy alliance and even quiet, humorous moments and some moments of actual appreciation between Oliver to Malcolm [in the past], and I think it's safe to say that for however long Malcom Merlyn is walking the Earth, that bridge has been burned forever," the actor stated.

"So it will be interesting to see what they do with the Oliver-Malcom dynamic, because they've never really been sworn enemies. They've gone up against each other in battle ... but the betrayal of giving up Oliver's son is something that they can never come back from, ever," as we quote.

 "Arrow" will be showing again in small screen on March 23, 8pm, on CW.