Is it possible to have mais then one spin-off at a time?

I just would really amor a Neverland spin-off, an Oz spin-off and a Frozen - Uma Aventura Congelante spin-off. I mean the Neverland spiin-off can estrela Baelfire and Hook and Pan is the main villain. With Oz, Glinda can come back and there are various threats besides Zelena where she must protect Oz from. For Frozen, it can take place right after we last see Elsa and Anna and Hans makes another attempt to take over Arendelle while forming an alliance with the Duke of Wesleton (Weaseltown|).