Most likely, they will only be available to characters who: 1) rolled during the month of October and 2) gain their tier 1 form(s) within the month of October. But I haven't made up my mind yet.

Because this is CF, one or more idiots are going to roll a hundred level 1 shapeshifters and park them in hopes of having these forms available for months and months to come, and one way or another I'll be thwarting that.