As Once Upon a Time prepares for its fourth season this fall, it will be bringing over a character from the less-than-successful spin-off show, Once Upon a Time in Wonderland.

Emma & Regina Against Each Other Again In Once Upon a Time Season 4?

The Knave of Hearts, a.k.a. Will Scarlet (Michael Sucha) is one character that will be transferring from Wonderland over to Once Upon a Time proper for Season 4, and co-creator Adam Horowitz has some plans in motion for him.

"It's too early for us to tease, but we think Michael is a fabulous actor and we have a way for him to fit into our group that's fun," Horowitz told TVLine recently. "He'll bring a new vibe and color to the show."

Frozen Character Elsa Becomes Villain of Once Upon a Time Season 4?

Once Upon a Time in Wonderland received very poor ratings during its limited run on ABC. It is unknown if producers intend on bring over more characters from the spin-off.

Very little info has been released on the fourth season of Once Upon a Time, though the biggest buzz going into the new season is the inclusion of Elsa, from Disney's massively successful animated film Frozen.

Elsa made her dramatic entrance to the show in the final moments of Season 3, wearing her iconic blue dress and sporting her blonde braid. It is unknown how big of presence Elsa will have in Season 4, though based on the popularity of Frozen, the producers will likely be taking full advantage of their access to the character.

Once Upon a Time Season 4 premieres in fall 2014 on ABC. The series will be returning to its regular Sundays at 8 p.m. timeslot.

Tags: Once Upon A Time television ABC