There is talks of a mini-series 13 episodes, of a wonderland series, Once: Wonderland. However Sebastian Stan would not be portraying the Mad hatter, due commitment to stage, and be recast. Cora would appear on the show.
I just started watching this show a couple weeks ago. It took me a few episodes to get hooked, because it is a little cheesy and some of the acting is questionable (Henry... ugh). However, the love for fairytales and Disney has me totally sucked in, and I LOVE how they tie all the stories together. Fantastic! I'm only a few episodes into Season 2, but now that I'm off work for a few days I'm hoping to get more caught up.