Since taking office at the BBC soap in August, the show's new boss and his team have been busy mapping out storyline plans until February 2015.
EastEnders' longest-serving cast member Adam Woodyatt (Ian Beale) will be among those taking centre stage with a big story next year, while Ronnie Mitchell will be heading in a new villainous direction.
Speaking at an EastEnders press event, Treadwell-Collins commented: "We've got massive stories for the Masoods, for Denise, for Kat and Alfie - and maybe our biggest stories for the Beale family. There's a big, big Beale story that will hit around Easter and keep going until the anniversary.
"It'll shock and entertain and hopefully make the nation weep. It will give Adam Woodyatt, who's a brilliant actor and a lovely man, a big chance to shine.
"The other thing is Ronnie will have a big story. The question with Ronnie is, 'Is she her father's daughter?' I think we're going to see with Ronnie how someone becomes a villain. I keep talking about Darth Vader - the making of a villain. Not a soap bitch, but a villain."
Discussing other characters, he promised: "Everyone will get a big story. There's big stories for Sharon, for Phil Mitchell, and for Carol.
"Lindsey Coulson is acting her socks off in her breast cancer story. It's a very important story and I've been sobbing in the edit suite a lot."
Treadwell-Collins also teased the upcoming exit of Janine Butcher, surprise return of Stacey Branning and arrival of Danny Dyer's Carter clan at the Queen Vic.
He explained: "You'll see Charlie Brooks's exit story. There will be a coda to that story. It's not going to be the last you'll see of Janine, but that's all I'll say at the moment.
"We've also got Lacey Turner's return as Stacey. [Story producer] Alex [Lamb] and I storylined the last time Stacey was on the Square. That was Act One. We know the character and we know where she's going to go.
"With the arrival of the Carters, stories are going to flow out of The Vic. But it's not going to be the Carter show and it's not going to be the Stacey Slater show - it's going to be EastEnders. This show works best when there's a bomb going off at The Vic, a bomb going off at the Beales' and a bomb going off at the Brannings'.
"Not a literal bomb! I think when you're stuck for story, you blow things up. I'm not saying I'm never going to blow anything up, but I don't care - let another soap win Most Spectacular Scene. I don't think soaps should be about blowing things up, I think they should be about characters, people and they should move you. I don't cry at houses getting blown up!"
Treadwell-Collins succeeded Lorraine Newman in the post of EastEnders' executive producer. He previously worked on EastEnders for four and a half years from October 2005, initially as senior story editor before later securing the post of story producer.
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